ORCID Profile
0000-0002-8165-3032
Current Organisation
Queensland University of Technology
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Ecological Applications | Forestry Sciences | Genetics | Evolutionary Biology | Horticultural Production | Plant Protection (Pests, Diseases And Weeds) | Pests, Health And Diseases | Management And Environment | Speciation and Extinction | Phylogeny and Comparative Analysis | Ecosystem Function | Analytical Biochemistry | Gene Expression | Horticultural Crop Protection (Pests, Diseases and Weeds) | Invasive Species Ecology | Invertebrate Biology | Behavioural Ecology
ANZSRC Socio-Economic Objective (SEO)
Environmentally Sustainable Plant Production not elsewhere classified | Forestry | Flora, Fauna and Biodiversity at Regional or Larger Scales | Ecosystem Assessment and Management of Forest and Woodlands Environments | Primary products from plants | Hardwood plantations | Field crops | Remnant Vegetation and Protected Conservation Areas in Farmland, Arable Cropland and Permanent Cropland Environments |
Related Links
Publications
Effect of tomato fruit cultivar and ripening stage on Bactrocera tryoni (Froggatt) egg and larval survival
Publisher: Wiley
Date: 20-08-2020
DOI: 10.1111/JEN.12813
Five commercial citrus rate poorly as hosts of the polyphagous fruit fly Bactrocera tryoni (Froggatt) (Diptera: Tephritidae) in laboratory studies
Publisher: Wiley
Date: 04-07-2012
Population structure of Bactrocera dorsalis s.s., B. papayae and B. philippinensis (diptera: Tephritidae) in southeast asia: Evidence for a single species hypothesis using mitochondrial DNA and wing-shape data
Publisher: Springer Science and Business Media LLC
Date: 2012
Gene expression responses of Bactrocera tryoni larvae feeding on different ripening stages of tomato fruit
Publisher: Wiley
Date: 07-02-2023
DOI: 10.1111/JEN.13101
Abstract: The Queensland fruit fly, Bactrocera tryoni , is an economically important pest insect of horticultural crops in Australia, damaging a wide variety of fruits and vegetables. To study the B. tryoni –fruit interaction, we conducted a transcriptomic investigation of B. tryoni larvae feeding on three ripening stages of tomato fruit, which had been previously shown to influence larval performance. Fruit fly larval survival in immature tomato fruit is very poor, which we hypothesized to be due to the effect of tomato fruit toxins which are mostly expressed in green fruit. We found 2709 transcripts differentially expressed in larvae feeding on the three ripening stages. The transcript expression pattern was most ergent between larvae feeding in immature fruit compared with fully ripe fruit, with intermediate expression in larvae feeding in colour‐break fruit. Gene Set Enrichment Analysis showed that larvae fed in immature fruit had a higher number of depleted GO terms in comparison with larvae fed on fully ripe fruit, particularly GO terms associated with larval development, metabolism and basic cellular functions. Enriched GO terms in larvae fed on fully ripe fruit showed the opposite pattern, with a greater number of enriched terms related to larval growth and detoxification processes. We concluded that poor larval survival in immature‐green fruit is likely because the substrate offers a very poor diet for larvae, which limits normal developmental functions. By contrast, in colour‐break and fully ripe fruit the substrate allows normal development, including the expression of metabolically costly detoxification mechanisms.
Foraging and vein‐cutting behaviour of Euploea core corinna (W. S. Macleay) (Lepidoptera: Nymphalidae) caterpillars feeding on latex‐bearing leaves
Publisher: Wiley
Date: 02-10-2000
Foraging behaviours of Diachasmimorpha kraussii (Fullaway) (Hymenoptera: Braconidae) and its host Bactrocera tryoni (Froggatt) (Diptera: Tephritidae) in a nectarine (Prunus persica (L.) Batsch var. nectarina (Aiton) Maxim) orchard
Publisher: Wiley
Date: 28-03-2011
Nutritional status and the foraging behaviour of Bactrocera tryoni with particular reference to protein bait spray
Publisher: Wiley
Date: 17-02-2014
DOI: 10.1111/PHEN.12045
The influence of leaf age on the oviposition preference of Chrysophtharta bimaculata (Olivier) and the establishment of neonates
Publisher: Wiley
Date: 05-2001
The impact of nutritional quality and gut bacteria on the fitness ofBactrocera minax(Diptera: Tephritidae)
Publisher: The Royal Society
Date: 07-2018
DOI: 10.1098/RSOS.180237
Abstract: To examine how nutritional quality and resident gut bacteria interplay in improving the fitness of an oligophagous fruit fly, Bactrocera minax , artificial sucrose diets and full diets (sucrose, tryptone and yeast extract) were fed to flies with and without antibiotic supplementation. Furthermore, Klebsiella oxytoca and Citrobacter freundii were supplemented to sucrose-only diets. Flies were maintained in the laboratory and the fitness parameters, male and female longevity, number of copulations and female fecundity, were recorded. Full diet without bacterial depletion significantly increased fecundity and copulation. In the absence of gut bacteria, flies fed with full diets had significantly decreased mean fecundity and copulation rate. Flies that were fed with sucrose diet had a very low copulation rate and produced no eggs. Diet type and the presence of bacteria did not have any effect on the average longevity of male and female flies. Bacterial supplementation in sucrose diets did not improve any of the measured parameters. The results demonstrate that gut bacteria interact with diet to influence mating and reproduction in B. minax . Symbiotic bacteria significantly and positively impact reproduction in B. minax however, their impact can only be fully realized when the flies are fed with a nutritionally complete diet.
Simultaneous tests of the preference-performance and phylogenetic conservatism hypotheses: Is either theory useful?
Publisher: Springer Science and Business Media LLC
Date: 18-01-2013
Towards continuous surveillance of fruit flies using sensor networks and machine vision
Publisher: IEEE
Date: 09-2009
Sexually-transmitted disease in a sub-tropical eucalypt beetle: Infection of the fittest?
Publisher: Springer Science and Business Media LLC
Date: 10-08-2007
Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) is not invasive through Asia: It's been there all along
Publisher: Wiley
Date: 16-05-2019
DOI: 10.1111/JEN.12649
Plant-Mediated Female Transcriptomic Changes Post-Mating in a Tephritid Fruit Fly, Bactrocera tryoni
Publisher: Oxford University Press (OUP)
Date: 06-12-2018
DOI: 10.1093/GBE/EVX257
Do Fruit Ripening Volatiles Enable Resource Specialism in Polyphagous Fruit Flies?
Publisher: Springer Science and Business Media LLC
Date: 09-2016
DOI: 10.1007/S10886-016-0752-5
Abstract: Frugivorous tephritid fruit flies have lineages with high levels of host generalism. These insects use olfaction to locate fruits, but how they are able to recognize the odors of so many different host species is poorly understood. We used a series of behavioral experiments to investigate the role of fruit ripening volatiles as host cues in the Queensland fruit fly, Bactrocera tryoni (Froggatt), a polyphagous pest in Australia. Odors of mature guava (Psidium guajava) attracted female and male flies more strongly than three other ripening stages and guava pulp. We analyzed volatiles from guava odor and selected eleven compounds, all of which elicited an electrophysiological response in the antenna of female flies. Three of these, ethyl acetate, ethyl butyrate, and ethyl propionate, were released at the highest rates from the most attractive ripening stage. In behavioral trials, these three esters were not attractive in idually, whereas a combination was necessary and sufficient in attracting female flies. The three-component blend was as attractive as the entire 11-component blend, which without these key volatiles was not attractive. Moreover, injecting low ranking hosts (squash and cucumber) with the three volatiles increased attraction in ovipositing female flies. These fruit flies are classed as generalists, but like many polyphagous insects they could be regarded as resource specialists, preferring specific plant reproductive stages with predictable odor cues. Exploring olfaction from this perspective could improve our understanding of host choice in polyphagous insects, and the selection of volatiles to be used as attractants in insect pest management.
Temperature effects on “overwintering” phenology of a polyphagous, tropical fruit fly (Tephritidae) at the subtropical/temperate interface
Publisher: Wiley
Date: 16-05-2019
DOI: 10.1111/JEN.12645
Two species of Acroclisoides girault and dodd (hymenoptera: pteromalidae) parasitic on Trissolcus basalis (wollaston) (hymenoptera: scelionidae), a parasitoid of Nezara viridula (L.) (hemiptera: pentatomidae)
Publisher: Wiley
Date: 11-1992
Male-lure type, lure dosage, and fly age at feeding all influence male mating success in Jarvis’ fruit fly
Publisher: Springer Science and Business Media LLC
Date: 14-09-2020
DOI: 10.1038/S41598-020-72209-X
Abstract: Males of certain Dacini fruit flies are strongly attracted to, and feed upon, plant secondary compounds such as methyl eugenol, raspberry ketone and zingerone. The consumed lure is generally found to induce physiological and behavioural changes that enhance the mating performance of lure-fed males. Male Bactrocera jarvisi respond strongly to zingerone from a young age, but only weakly respond to raspberry ketone. We hypothesized that this selective lure-response would be reflected in the physiological importance of the lure to the fly. We found that zingerone feeding by young males resulted in significantly greater mating success in competitive mating trials with lure-deprived flies, but the mating advantage was lost in older males. Lure dosage had a significant effect on the duration of the mating advantage, for ex le when fed 20 µg of zingerone, the advantage lasted only 1 day post-feeding, but when fed of 50 µg zingerone the advantage lasted 7 days. Raspberry ketone feeding did not confer any mating advantage to males except at one dosage (50 µg) for 1 day after feeding. When given a choice, B. jarvisi females preferred to mate with zingerone-fed versus to raspberry ketone-fed males. This study revealed lure, dosage and age of fly at time of lure administration are all important factors for maximising lure-enhanced fruit fly mating performance. These findings contribute to a better theoretical understanding of the evolution of fruit fly-lure interactions and may help improve fruit fly pest management via the Sterile Insect Technique through semiochemical-mediated enhancement of sterile male mating performance.
Signatures of invasion: using an integrative approach to infer the spread of melon fly, Zeugodacus cucurbitae (Diptera: Tephritidae), across Southeast Asia and the West Pacific
Publisher: Springer Science and Business Media LLC
Date: 17-02-2017
Monarchs in Australia: On the Winds of a Storm?
Publisher: Springer Science and Business Media LLC
Date: 2004
‘Ladd traps’ as a visual trap for male and female Queensland fruit fly, Bactrocera tryoni (Diptera: Tephritidae )
Publisher: Wiley
Date: 09-03-2016
DOI: 10.1111/AEN.12192
A rapid method of estimating catches of abundant fruit fly species (Diptera: Tephritidae) in modified Steiner traps
Publisher: Wiley
Date: 02-2000
Indirect effects of phytochemicals on offspring performance of Queensland fruit fly,Bactrocera tryoni(Diptera: Tephritidae)
Publisher: Wiley
Date: 11-09-2014
DOI: 10.1111/JEN.12082
Influence of Host Plant Structure and Microclimate on the Abundance and Behavior of a Tephritid Fly
Publisher: Springer Science and Business Media LLC
Date: 03-2004
Microbial mediation of fruit fly–host plant interactions: is the host plant the “centre of activity”?
Publisher: Wiley
Date: 06-2002
Host specialization and species richness of fruit flies (Diptera: Tephritidae) in a New Guinea rain forest
Publisher: Cambridge University Press (CUP)
Date: 2005
DOI: 10.1017/S0266467404002044
Abstract: Frugivorous dacine fruit flies were studied in a lowland tropical rain forest in Papua New Guinea to determine their host specificity, abundance, and the number of species attacking various plant species. Plant species hosted 0–3 fruit fly species at median (1–3 quartile) densities of 1 (0–17) fruit flies per 100 fruits. Fruit flies were mostly specialized to a single plant family (83% species) and within each family to a single genus (88% species), while most of the species (66%) were able to feed on congeneric plant species. Only 30 from the 53 studied plant species were colonized by fruit flies. The plant–fruit fly food web, including these 30 plant species and the total of 29 fruit fly species feeding on them, was ided into 14 compartments, each including 1–8 plant species hosting mutually disjunct assemblages of fruit flies. This structure minimizes indirect interactions among plant species via shared herbivores. The local species pool was estimated at 152±32 (±SE) fruit fly species. Forty per cent of all taxonomically described species known from Papua New Guinea were reared or trapped in our study area. Such a high proportion indicates low beta- ersity of fruit flies. Steiner traps were highly efficient in s ling the lure-responsive fruit fly species as they re-collected 84% of all species trapped in the same area 5 y before. Fruit fly monitoring by these traps is a cheap, simple and efficient method for the study of spatial and temporal changes in rain-forest communities.
Comparative demography of a specialist and generalist fruit fly: Implications for host use and pest management
Publisher: Wiley
Date: 05-02-2023
DOI: 10.1111/AAB.12818
Abstract: Host plants used by phytophagous insects can have significant consequences on demography parameters, overall lifetime fitness and their subsequent population dynamics. Here, we conduct a comparative demographic study between the specialist Zeugodacus cucumis (French) and generalist Bactrocera tryoni (Froggatt) (Diptera: Tephritidae) to determine whether the host plants used by these fly species play any role in their overall lifetime fitness and explains current host use patterns. These two fly species are pests within the north‐eastern region of Australia and we further aimed to use complete life‐history data to determine the population parameters and models that would help identify the sensitive life‐history stage that could be targeted for effective field management. Eggs collected from laboratory‐reared flies were inoculated into organically grown fruits of both the primary and alternate host plant cultivars of both fly species. The proportion surviving each life stage from egg through to adult and fecundity were monitored for all cohorts from the different plant cultivars. Complete stage‐base life‐tables for cohorts of each fly species developing from each fruit cultivar were constructed, and the key demographic parameters and population models were analysed using PopTools matrix model programme. Our results showed that the host used by each fly species had significant consequences on fly demographic parameters and hence their overall lifetime fitness. The generalist B. tryoni was able to compensate for the fitness loss experienced at the pre‐adult stage by having adults with higher fecundity, but this was not the case for the specialist Z. cucumis . Stage‐base population models revealed that the population growth rate of both species was highly sensitive at the adult reproductive stage, indicating that manipulating probability of survival at this life stage would effectively manage populations of these pest species. This study provides the empirical evidence of undertaking complete life history demography studies of phytophagous insects to accurately understand their lifetime fitness consequences of using a certain host, their observed host use patterns, and overall population dynamics. We suggest that any efforts to manage dacine fruit fly pest population should consider life‐history consequences of host use.
Memory duration is positively correlated with host fruit preference and offspring performance in a polyphagous frugivore
Publisher: Wiley
Date: 23-06-2020
DOI: 10.1111/AEN.12475
Does previous experience enhance foraging on a particular host in a polyphagous frugivore?
Publisher: Wiley
Date: 07-2020
DOI: 10.1111/EEA.12945
Sexual selection in a tropical fruit fly: role of a plant derived chemical in mate choice
Publisher: Wiley
Date: 24-06-2003
Monarchs across the Pacific: the Columbus hypothesis revisited
Publisher: Oxford University Press (OUP)
Date: 22-04-2004
The seasonal phenology of Bactrocera tryoni (Froggatt) (Diptera: Tephritidae) in Queensland
Publisher: Wiley
Date: 08-2010
Species status and population structure of the Australian Eucalyptus pest Paropsis atomaria Olivier (Coleoptera: Chrysomelidae)
Publisher: Wiley
Date: 20-10-2006
Spatial and temporal foraging patterns of Queensland fruit fly, Bactrocera tryoni (Froggatt) (Diptera: Tephritidae), for protein and implications for management
Publisher: Wiley
Date: 14-05-2012
Distribution and biogeography of Bactrocera and Dacus species (Diptera: Tephritidae) in Papua New Guinea
Publisher: Wiley
Date: 05-2004
Bactrocera tryoni (Froggatt) (Diptera: Tephritidae) overwintering: an overview
Publisher: Wiley
Date: 07-09-2019
DOI: 10.1111/AEN.12369
Response of Male Queensland Fruit Fly (Diptera: Tephritidae) to Host Fruit Odors
Publisher: Oxford University Press (OUP)
Date: 15-05-2020
DOI: 10.1093/JEE/TOAA084
Abstract: The surveillance and management of Dacini fruit fly pests are commonly split by fly gender: male trapping focuses on the dacine ‘male-lures’, whereas female trapping focuses on lures based on host-fruit volatiles. Although the males of several Dacini species have been reported to be attracted to host fruit volatiles, the option of using host-fruit traps for males has, to date, been ignored. Males of the cue-lure responsive fruit fly Bactrocera tryoni (Froggatt) have been recorded as responding to host-fruit volatile blends, but it is not known how frequently this happens, if it is age-dependent, or the strength of the response relative to cue-lure throughout the year. Here, we conducted an olfactometer experiment to test the lifetime (weeks 1–15) response of B. tryoni males to the odor of tomato, a known host of this fly, and compare catches of wild males to tomato-based traps and cue-lure traps in the field. Bactrocera tryoni males started to respond to tomato odor as they sexually matured (2 to 3 wk olds) and thereafter showed consistent olfactory response until advanced age (15 wk). In the field, wild males were captured by tomato-based traps throughout the year at a level not significantly different from cue-lure traps. The reason for the consistent B. tryoni male response to host fruit odor at this stage is not known, but it certainly occurs at a level greater than can be continued to be ignored for both basic and applied research.
Impact of habitat modification on the distribution and abundance of fruit flies (Diptera: Tephritidae) in Southeast Queensland
Publisher: No publisher found
Date: 2000
DOI: 10.1007%2FPL00011994
Modelling a forest lepidopteran: phenological plasticity determines voltinism which influences population dynamics
Publisher: Elsevier BV
Date: 08-2004
Close‐distance courtship of laboratory reared Bactrocera tryoni (Diptera: Tephritidae)
Publisher: Wiley
Date: 08-2018
DOI: 10.1111/AEN.12365
Opiine parasitoids (Hymenoptera: Braconidae) of tropical fruit flies (Diptera: Tephritidae) of the Australian and South Pacific region
Publisher: Cambridge University Press (CUP)
Date: 12-2005
DOI: 10.1079/BER2005383
Abstract: Opiine wasps are parasitoids of dacine fruit flies, the primary horticultural pests of Australia and the South Pacific. A taxonomic synopsis and distribution and host records (44% of which are new) for each of the 15 species of dacine-parasitizing opiine braconids found in the South Pacific is presented. Species dealt with are Diachasmimorpha hageni (Fullaway), D. kraussii (Fullaway), D. longicaudata (Ashmead), D. tryoni (Cameron), Fopius arisanus (Sonan), F. deeralensis (Fullaway), F. ferrari Carmichael & Wharton sp. n. , F. illusorius (Fischer) comb. n. , F. schlingeri Wharton, Opius froggatti Fullaway , Psyttalia fijiensis (Fullaway), P. muesebecki (Fischer), P. novaguineensis (Szépligeti) and Utetes perkinsi (Fullaway). A potentially undescribed species, which may be a colour morph of F. vandenboschi (Fullaway), is diagnosed but not formally described. Fopius vandenboschi sensu stricto, Diachasmimorpha fullawayi Silvestri , Psyttalia concolor Szépligeti and P. incisi Silvestri have been liberated into the region but are not considered to have established: a brief diagnosis of each is included. Biosteres illusorius Fischer is formally transferred to the genus Fopius . A single opiine specimen reared from a species of Bactrocera ( Bulladacus ) appears to be Utetes albimanus (Szépligeti), but damage to this specimen and to the holotype (the only previously known specimen) means that this species remains unconfirmed as a fruit fly parasite: a diagnosis of U . cf. albimanus is provided. Psyttalia novaguineensis could not be adequately separated from P. fijiensis using previously published characterizations and further work to resolve this complex is recommended. A key is provided to all taxa.
The complexities of knowing what it is you are trapping
Publisher: Springer Netherlands
Date: 2014
Area-wide management guidelines for Sterile Insect Technique developed through interdisciplinary modelling research
Publisher: Modelling and Simulation Society of Australia and New Zealand
Date: 12-2019
Can hybridization cause local extinction: A case for demographic swamping of the Australian native Senecio pinnatifolius by the invasive Senecio madagascariensis?
Publisher: Wiley
Date: 11-09-2007
DOI: 10.1111/J.1469-8137.2007.02217.X
Abstract: Hybridization between native and invasive species can have several outcomes, including enhanced weediness in hybrid progeny, evolution of new hybrid lineages and decline of hybridizing species. Whether there is a decline of hybridizing species largely depends on the relative frequencies of parental taxa and the viability of hybrid progeny. Here, the in idual- and population-level consequences of hybridization between the Australian native Senecio pinnatifolius and the exotic Senecio madagascariensis were investigated with lified fragment length polymorphism (AFLP) markers, and this information was used to estimate the annual loss of viable seeds to hybridization. A high frequency (range 8.3-75.6%) of hybrids was detected in open pollinated seeds of both species, but mature hybrids were absent from sympatric populations. A hybridization advantage was observed for S. madagascariensis, where significantly more progeny than expected were sired based on proportional representation of the two species in sympatric populations. Calculations indicated that S. pinnatifolius would produce less viable seed than S. madagascariensis, if hybridization was frequency dependent and S. madagascariensis reached a frequency of between 10 and 60%. For this native-exotic species pair, prezygotic isolating barriers are weak, but low hybrid viability maintains a strong postzygotic barrier to introgression. As a result of asymmetric hybridization, S. pinnatifolius would appear to be under threat if S. madagascariensis increases numerically in areas of contact.
Resting sites, edge effects and dispersion of a polyphagous Bactrocera fruit fly within crops of different architecture
Publisher: Wiley
Date: 04-12-2014
DOI: 10.1111/JEN.12100
Direct and indirect effects of egg parasitism by Neopolycystus Girault sp. (Hymenoptera: Pteromalidae) on Paropsis atomaria Olivier (Coleoptera: Chrysomelidae)
Publisher: Wiley
Date: 08-2008
Oviposition deterrence is likely an effect, not a mechanism, in the leaf beetle Chrysophtharta bimaculata (Olivier) (Coleoptera: Chrysomelidae)
Publisher: Springer Science and Business Media LLC
Date: 09-2005
Performance of first instar Chrysophtharta bimaculata larvae (Coleoptera
Publisher: Springer Science and Business Media LLC
Date: 06-1996
DOI: 10.1007/BF01239486
A molecular phylogeny for the Tribe Dacini (Diptera: Tephritidae): Systematic and biogeographic implications
Publisher: Elsevier BV
Date: 09-2012
DOI: 10.1016/J.YMPEV.2012.05.006
Abstract: With well over 700 species, the Tribe Dacini is one of the most species-rich clades within the dipteran family Tephritidae, the true fruit flies. Nearly all Dacini belong to one of two very large genera, Dacus Fabricius and Bactrocera Macquart. The distribution of the genera overlap in or around the Indian subcontinent, but the greatest ersity of Dacus is in Africa and the greatest ersity of Bactrocera is in south-east Asia and the Pacific. The monophyly of these two genera has not been rigorously established, with previous phylogenies only including a small number of species and always heavily biased to one genus over the other. Moreover, the subgeneric taxonomy within both genera is complex and the monophyly of many subgenera has not been explicitly tested. Previous hypotheses about the biogeography of the Dacini based on morphological reviews and current distributions of taxa have invoked an out-of-India hypothesis however this has not been tested in a phylogenetic framework. We attempted to resolve these issues with a dated, molecular phylogeny of 125 Dacini species generated using 16S, COI, COII and white eye genes. The phylogeny shows that Bactrocera is not monophyletic, but rather consists of two major clades: Bactrocera s.s. and the 'Zeugodacus group of subgenera' (a recognised, but informal taxonomic grouping of 15 Bactrocera subgenera). This 'Zeugodacus' clade is the sister group to Dacus, not Bactrocera and, based on current distributions, split from Dacus before that genus moved into Africa. We recommend that taxonomic consideration be given to raising Zeugodacus to genus level. Supportive of predictions following from the out-of-India hypothesis, the first common ancestor of the Dacini arose in the mid-Cretaceous approximately 80mya. Major ergence events occurred during the Indian rafting period and ersification of Bactrocera apparently did not begin until after India docked with Eurasia (50-35mya). In contrast, ersification in Dacus, at approximately 65mya, apparently began much earlier than predicted by the out-of-India hypothesis, suggesting that, if the Dacini arose on the Indian plate, then ancestral Dacus may have left the plate in the mid to late Cretaceous via the well documented India-Madagascar-Africa migration route. We conclude that the phylogeny does not disprove the predictions of an out-of-India hypothesis for the Dacini, although modification of the original hypothesis is required.
Bactrocera dorsalis preference for and performance on two mango varieties at three stages of ripeness
Publisher: Wiley
Date: 18-05-2009
Chromatin immunoprecipitation (ChIP) method for non-model fruit flies (Diptera: Tephritidae) and evidence of histone modifications
Publisher: Public Library of Science (PLoS)
Date: 15-03-2018
Population structure of a global agricultural invasive pest, Bactrocera dorsalis (Diptera: Tephritidae)
Publisher: Wiley
Date: 28-09-2018
DOI: 10.1111/EVA.12701
Effect of citrus peel chemicals on Bactrocera tryoni larval survival
Publisher: International Society for Horticultural Science (ISHS)
Date: 12-2015
An improved culturing method for opiine fruit fly parasitoids and its application to parasitoid monitoring in the field
Publisher: Wiley
Date: 24-11-2018
Abstract: Good culturing methods play an important role in the study of insect behavior and its application to pest management. Here, we describe and validate a new method for rearing the parasitoid wasp, Diachasmimorpha kraussii, which attacks some of the world's worst fruit fly pests and is an internationally used biological control agent. Our method differs from standard culturing approaches by presenting adult wasps with host-infested artificial media within a "culturing bag," which mimics a natural (fruit) oviposition substrate. In laboratory trials using wild collected D. kraussii, the culturing bag method was compared to the use of host-infested nectarines, and a commonly used laboratory method of presenting host-infested artificial media within Petri dishes. The culturing bag method proved to be a significant improvement on both methods, combining the advantages of high host survival in artificial media with parasitism levels that were the equivalent to those recorded using host-infested fruits. In our field study, culturing bags infested with the Queensland fruit fly, Bactrocera tryoni, and hung in a mixed peach and nectarine orchard proved to be effective "artificial fruits" attracting wild D. kraussii for oviposition. Significantly more adult wasps were reared from the culturing bags compared to field collected fruits. This was shown to be due to higher fruit fly larval density in the bags, as similar percentage parasitism rates were found between the culturing bags and ripe fruits. We discuss how this cheap, time-efficient method could be applied to collecting and monitoring wild D. kraussii populations in orchards, and assist in maintaining genetic variability in parasitoid laboratory cultures.
Susceptibility of Eucalyptus globulus ssp. globulus to sawfly (Perga affinis ssp. insularis) attack and its potential impact on plantation productivity
Publisher: Elsevier BV
Date: 05-2002
Bactrocera dorsalis male sterilization by targeted RNA interference of spermatogenesis: Empowering sterile insect technique programs
Publisher: Springer Science and Business Media LLC
Date: 21-10-2016
DOI: 10.1038/SREP35750
Abstract: RNA interference (RNAi) is a genetic technique which has novel application for sustainable pest control. The Sterile Insect Technique (SIT) uses releases of mass-produced, sterile male insects to out-compete wild males for mates to reduce pest populations. RNAi sterilization of SIT males would have several advantages over radiation sterilization, but to achieve this appropriate target genes must first be identified and then targeted with interference technology. With this goal, eight spermatogenesis related candidate genes were cloned and tested for potential activity in Bactrocera dorsalis . The knockdown of candidate genes by oral delivery of dsRNAs did not influence the mating of male flies, but significantly affected the daily average number of eggs laid by females, and reduced egg hatching rate by 16–60%. RNAi negatively affected spermatozoa quantitatively and qualitatively. Following the mating of lola -/ topi -/ rac -/ rho -/ upd -/ magu -silenced males, we recorded a significant decrease in number and length of spermatozoa in female spermatheca compared to gfp -silenced control group. In a greenhouse trial, the number of damaged oranges and B. dorsalis larvae were significantly reduced in a ds rho -treated group compared with the ds gfp group. This study provides strong evidence for the use RNAi in pest management, especially for the improvement of SIT against B. dorsalis and other species.
Are insect frugivores always plant pests? The impact of fruit fly (Diptera: Tephritidae) larvae on host plant fitness
Publisher: Springer Science and Business Media LLC
Date: 13-10-2012
Host use and crop impacts of Oribius Marshall species (Coleoptera: Curculionidae) in Eastern Highlands Province, Papua New Guinea
Publisher: Cambridge University Press (CUP)
Date: 14-04-2010
DOI: 10.1017/S0007485309006877
Abstract: Oribius species are small flightless weevils endemic to the island of New Guinea and far northern Cape York, Australia. The adults feed externally on leaves, developing fruit and green bark, but their impact as pests and general host use patterns are poorly known. Working in Eastern Highlands Province, Papua New Guinea, we carried out structured host use surveys, farmer surveys, shade-house growth trials and on-farm and on-station impact trials to: (i) estimate the host range of the local Oribius species (ii) understand adult daily activity patterns (iii) elucidate feeding habits of the soil dwelling larvae and (iv) quantify the impacts of adult feeding damage. Oribius inimicus and O. destructor accounted for nearly all the Oribius species encountered locally, of these two O. inimicus was the most abundant. Weevils were collected from 31 of 33 plants surveyed in the Aiyura Valley, and a combination of farmer interviews and literature records provided evidence for the beetles being pestiferous on 43 crops currently or previously grown in the Highlands. Adult weevils had a distinct diurnal pattern of being in the upper plant canopy early in the morning and, to a lesser extent, again late in the afternoon. For the remainder of the day, beetles resided within the canopy, or possibly off the plant. Movement of adults between plants appeared frequent. Pot trials confirmed the larvae are root feeders. Quantified impact studies showed that the weevils are damaging to a range of vegetable and orchard crops (broccoli, capsicum, celery, French bean, Irish potato, lettuce, orange and strawberry), causing average yield losses of around 30–40%, but up to 100% on citrus. Oribius weevils pose a significant and, apparently, growing problem for Highland's agriculture.
Gonipterus scutellatus Gyllenhal (Coleoptera: Curculionidae) oviposition on seven naturally co-occurring Eucalyptus species
Publisher: Elsevier BV
Date: 10-1998
The influence of diet and the presence of fruit fly hosts on the egg load dynamics of the parasitoid Diachasmimorpha kraussii (Hymenoptera: Braconidae)
Publisher: Informa UK Limited
Date: 10-02-2021
In the footsteps of Wallace: population structure in the breadfruit fruit fly, Bactrocera umbrosa (F.) (Diptera: Tephritidae), suggests disjunction across the Indo‐Australian Archipelago
Publisher: Wiley
Date: 05-11-2019
DOI: 10.1111/AEN.12375
Population structure in Zeugodacus cucurbitae (Diptera: Tephritidae) across Thailand and the Thai–Malay peninsula: natural barriers to a great disperser
Publisher: Oxford University Press (OUP)
Date: 28-03-2017
Evolution of lure response in tephritid fruit flies: phytochemicals as drivers of sexual selection
Publisher: Elsevier BV
Date: 04-2013
Why so many polyphagous fruit flies (Diptera: Tephritidae)? A further contribution to the 'generalism' debate
Publisher: Oxford University Press (OUP)
Date: 09-2016
DOI: 10.1111/BIJ.12880
Integrated pest management in forestry: Some difficulties in pursuing the holy-grail
Publisher: Informa UK Limited
Date: 1995
Female–female aggression in Bactrocera tryoni (Diptera: Tephritidae) and the influence of fruit quality on combat intensity
Publisher: Wiley
Date: 24-09-2023
DOI: 10.1111/AEN.12668
Opiine parasitoids (Hymenoptera: Braconidae) and biological control of fruit flies (Diptera: Tephritidae) in Australia: Past, present and future
Publisher: Wiley
Date: 29-12-2021
DOI: 10.1111/AAB.12724
Abstract: Opiine braconids are parasitoids of the immature stages of frugivorous tephritids. The female wasp lays her eggs into the eggs or larvae of the fruit fly host, where the immature wasp develops before emerging as a next‐generation adult from the now dead host pupal case. In support of a new generation of Australian fruit fly parasitoid research, this paper comprehensively reviews what is known about the Australian fruit fly infesting opiines. Based on the most recent taxonomic revision 11 fruit fly infesting opiine species are documented to occur in Australia, but we consider as doubtful the record for Diachasmimorpha longicaudata and consider the record for Fopius illusorius to be tentative without further collections. We identify that the systematics and taxonomy of the Australian native fruit fly infesting opiines are in urgent need of further work. The history of fruit fly biological control in Australia is comprehensively reviewed, including the export of native Australian opiines for fruit fly control elsewhere in the world. Australia was actively involved in three major classical biological control programmes against fruit flies from the turn of the 1900s until the mid‐1960s. Despite the introduction of 11 opiine species, plus numerous other natural enemies, only Fopius arisanus established in eastern Australia, where in South‐east Queensland it can now cause between 30 and 40% mean parasitism. In addition to the exotic F. arisanus , the native species Diachasmimorpha kraussii and Diachasmimorpha tryoni also cause fruit fly parasitism in agriculturally important crops: both species have also been liberated widely outside of Australia for fruit fly control. Other Australian opiines have not been reared from flies infesting commercial crops and appear biologically restricted to the fruits and environs of Australian east‐coast rainforests. The biology literature for D. tryoni and D. kraussii is comprehensively reviewed, while for F. arisanus , already reviewed elsewhere, key literature only is covered. Forward looking, we consider the potential for inoculative or inundative releases of opiines in areas where they do not currently occur to be good, while conservation biological control may help to increase the impacts of parasitoids in areas where they are already established.
Biotic indirect effects: A neglected concept in invasion biology
Publisher: Wiley
Date: 16-06-2006
The influence of soil type and moisture on pupal survival of Bactrocera tryoni (Froggatt) (Diptera: Tephritidae)
Publisher: Wiley
Date: 02-2006
Development of internal COI primers to improve and extend barcoding of fruit flies (Diptera: Tephritidae: Dacini)
Publisher: Wiley
Date: 24-07-2018
Abstract: Accurate species-level identifications underpin many aspects of basic and applied biology however, identifications can be h ered by a lack of discriminating morphological characters, taxonomic expertise or time. Molecular approaches, such as DNA "barcoding" of the cytochrome c oxidase (COI) gene, are argued to overcome these issues. However, nuclear encoding of mitochondrial genes (numts) and poor lification success of suboptimally preserved specimens can lead to erroneous identifications. One insect group for which these molecular and morphological problems are significant are the dacine fruit flies (Diptera: Tephritidae: Dacini). We addressed these issues associated with COI barcoding in the dacines by first assessing several "universal" COI primers against public mitochondrial genome and numt sequences for dacine taxa. We then modified a set of four primers that more closely matched true dacine COI sequence and lified two overlapping portions of the COI barcode region. Our new primers were tested alongside universal primers on a selection of dacine species, including both fresh preserved and decades-old dry specimens. Additionally, Bactrocera tryoni mitochondrial and nuclear genomes were compared to identify putative numts. Four numt clades were identified, three of which were lified using existing universal primers. In contrast, our new primers preferentially lified the "true" mitochondrial COI barcode in all dacine species tested. The new primers also successfully lified partial barcodes from dry specimens for which full length barcodes were unobtainable. Thus we recommend these new primers be incorporated into the suites of primers used by diagnosticians and quarantine labs for the accurate identification of dacine species.
The mating system of the true fruit fly Bactrocera tryoni and its sister species, Bactrocera neohumeralis
Publisher: Wiley
Date: 25-05-2016
Abstract: The frugivorous "true" fruit fly, Bactrocera tryoni (Queensland fruit fly), is presumed to have a nonresourced-based lek mating system. This is largely untested, and contrary data exists to suggest Bactrocera tryoni may have a resource-based mating system focused on fruiting host plants. We tested the mating system of Bactrocera tryoni, and its close sibling Bactrocera neohumeralis, in large field cages using laboratory reared flies. We used observational experiments that allowed us to determine if: (i) mating pairs were aggregated or nonaggregated (ii) mating system was resource or nonresource based (iii) flies utilized possible landmarks (tall trees over short) as mate-rendezvous sites and (iv) males called females from male-dominated leks. We recorded nearly 250 Bactrocera tryoni mating pairs across all experiments, revealing that: (i) mating pairs were aggregated (ii) mating nearly always occurred in tall trees over short (iii) mating was nonresource based and (iv) that males and females arrived at the mate-rendezvous site together with no evidence that males preceded females. Bactrocera neohumeralis copulations were much more infrequent (only 30 mating pairs in total), but for those pairs there was a similar preference for tall trees and no evidence of a resource-based mating system. Some aspects of Bactrocera tryoni mating behavior align with theoretical expectations of a lekking system, but others do not. Until evidence for unequivocal female choice can be provided (as predicted under a true lek), the mating system of Bactrocera tryoni is best described as a nonresource based, aggregation system for which we also have evidence that land-marking may be involved.
Impact of habitat modification on the distribution and abundance of fruit flies (Diptera: Tephritidae) in Southeast Queensland
Publisher: Wiley
Date: 09-2000
DOI: 10.1007/PL00011994
Lineage maintenance due to assortative mating but not ecological divergence in a sympatric sibling species pair
Publisher: Cold Spring Harbor Laboratory
Date: 31-08-2023
DOI: 10.1101/2023.08.30.555036
Abstract: Background : Lineage theory suggests that the development of traits associated with reproductive isolation coupled with traits associated with ecological differentiation are essential for the maintenance of sympatric lineages. However, the relative importance of these factors has rarely been tested simultaneously. Bactrocera tryoni and B. neohumeralis are a tephritid fruit fly species pair that have significant overlap in geographic range and host use, with time of male mating the only known difference in their mating systems. Using this system, we tested the relative importance of ecological differentiation versus assortative mating in sympatric lineage maintenance. Results : Genome-wide SNP analyses found strong genetic differentiation between the species with no evidence for hybridization in the field. Most outlier SNPs were restricted to narrow regions towards the centromeres and telomeres of chromosomes. Enrichment of annotation terms indicated an overabundance of genes with the abnormal neuroanatomy term. Terms of interest associated with sleep and circadian rhythm, potentially important to the allochronic reproductive barrier, were non-enriched. Ecological data found no evidence for ecological ergence or competitive displacement between the two species based on significant positive correlations between species numbers trapped at different times of the year, trapped in different habitats within a region, or when reared from fruit. Conclusions : Our study highlights the significance of assortative mating over ecological differentiation for sympatric lineage maintenance of the B. tryoni/B. neohumeralis sibling pair. The paper represents one of the most well-characterized ex les of the importance of genomic ergence in the coexistence of two closely related species.
Unisexual broods and sex ratios in a polyembryonic encyrtid parasitoid (Copidosoma sp.: Hymenoptera)
Publisher: Springer Science and Business Media LLC
Date: 1992
DOI: 10.1007/BF00319027
Changes in energy metabolism trigger pupal diapause transition of bactrocera minax after 20-hydroxyecdysone application
Publisher: Frontiers Media SA
Date: 30-10-2019
Pupal diapause development and termination is driven by low temperature chilling in Bactrocera minax
Publisher: Springer Science and Business Media LLC
Date: 20-04-2013
Oviposition preference of a Eucalyptus herbivore and the importance of leaf age on interspecific host choice
Publisher: Wiley
Date: 05-1998
Age-related changes in the reproductive potential of the Queensland fruit fly
Publisher: Elsevier BV
Date: 05-2021
CURRENT DISTRIBUTION AND PEST STATUS OF NEZARA VIRIDULA (L.) (HEMIPTERA: PENTATOMIDAE) IN AUSTRALIA
Publisher: Wiley
Date: 11-1992
Tephritid Integrative Taxonomy: Where We Are Now, with a Focus on the Resolution of Three Tropical Fruit Fly Species Complexes
Publisher: Annual Reviews
Date: 31-01-2017
DOI: 10.1146/ANNUREV-ENTO-031616-035518
Abstract: Accurate species delimitation underpins good taxonomy. Formalization of integrative taxonomy in the past decade has provided a framework for using multidisciplinary data to make species delimitation hypotheses more rigorous. We address the current state of integrative taxonomy by using as a case study an international project targeted at resolving three important tephritid species complexes: Bactrocera dorsalis complex, Anastrepha fraterculus complex, and Ceratitis FAR (C. fasciventris, C. anonae, C. rosa) complex. The integrative taxonomic approach has helped deliver significant advances in resolving these complexes: It has been used to identify some taxa as belonging to the same biological species as well as to confirm hidden cryptic ersity under a single taxonomic name. Nevertheless, the general application of integrative taxonomy has not been without issue, revealing challenges that must be considered when undertaking an integrative taxonomy project. Scrutiny of this international case study provides a unique opportunity to document lessons learned for the benefit of not only tephritid taxonomists, but also the wider taxonomic community.
Effects of advanced age on olfactory response of male and female Queensland fruit fly, Bactrocera tryoni (Froggatt) (Diptera Tephritidae)
Publisher: Elsevier BV
Date: 04-2020
Changes in eucalypt architecture and the foraging behaviour and development of Amorbus obscuricornis (Hemiptera: Coreidae)
Publisher: Cambridge University Press (CUP)
Date: 12-1998
DOI: 10.1017/S0007485300054316
Abstract: Field surveys, manipulative field experiments and laboratory studies were employed to study the behaviour and development of a large coreid, Amorbus obscuricornis (Westwood), in response to changes in the architecture/foliar quality of Eucalyptus (Myrtaceae) hosts in Tasmania, Australia. Following tree decapitation and subsequent regrowth, A. obscuricornis nymphs were only associated with coppiced hosts. Eucalypts coppiced naturally by wild fire were found to carry significantly more nymphs than non-coppiced conspecific hosts. In contrast, adult A. obscuricornis were found on both coppiced and non-coppiced hosts. The foliar quality of coppiced hosts was superior to that of non-coppiced hosts being softer, having a higher moisture content and a lower C/N ratio. Field collected fifth instar nymphs were heavier when collected from coppice vs. noncoppice but in bagged shoot experiments second instar nymphs gained less weight on coppice than non-coppice. It is suggested that because coppice is softer the shoots may deteriorate (i.e. wilt) more quickly than non-coppice shoots. Through different exposure regimes, it was confirmed that first instar nymphs need only water to ecdyse, while feeding is initiated in the second instar. Differences in the nutritional requirements of first and second instar nymphs were reflected in their behaviour. First instar nymphs did not discriminate between conspecific hosts on the basis of whether they were coppiced or not, whereas second instar nymphs preferentially chose coppiced conspecific hosts. The findings of this work are discussed in the context of the plant vigour and resource regulation hypotheses.
Test of the enemy release hypothesis: The native magpie moth prefers a native fireweed (Senecio pinnatifolius) to its introduced congener (S. madagascariensis)
Publisher: Wiley
Date: 06-01-2008
One and the same: integrative taxonomic evidence thatBactrocera invadens(Diptera: Tephritidae) is the same species as the Oriental fruit flyBactrocera dorsalis
Publisher: Wiley
Date: 28-10-2015
DOI: 10.1111/SYEN.12114
Natural enemies of Paropsis atomaria Olivier (Coleoptera: Chrysomelidae) in south-eastern Queensland eucalypt plantations
Publisher: Wiley
Date: 08-2008
From laboratory to the field: consistent effects of experience on host location by the fruit fly parasitoid Diachasmimorpha kraussii (Hymenoptera: Braconidae)
Publisher: Wiley
Date: 17-04-2018
Abstract: Associative learning is well documented in Hymenopteran parasitoids, where it is thought to be an adaptive mechanism for increasing successful host location in complex environments. Based on this learning capacity, it has been suggested that providing prerelease training to parasitoids reared for inundative release may lead to a subsequent increase in their efficacy as biological control agents. Using the fruit fly parasitoid Diachasmimorpha krausii we tested this hypothesis in a series of associative learning experiments which involved the parasitoid, two host fruits (tomatoes and nectarine), and one host fly (Bactrocera tryoni). In sequential Y-tube olfactometer studies, large field-cage studies, and then open field studies, naïve wasps showed a consistent preference for nectarines over tomatoes. The preference for nectarines was retained, but not significantly increased, for wasps which had prior training exposure to nectarines. However, and again consistently at all three spatial scales, prior experience on tomatoes led to significantly increased attraction to this fruit by tomato-trained wasps, including those liberated freely in the environment. These results, showing consistency of learning at multiple spatial scales, gives confidence to the many laboratory-based learning studies which are extrapolated to the field without testing. The experiment also provides direct experimental support for the proposed practice of enhancing the quality of inundatively released parasitoids through associative learning.
Host location by the fruit fly parasitoid Diachasmimorpha krausii: Role of fruit fly species, life stage and host plant
Publisher: Wiley
Date: 26-06-2012
The ecology of Bactrocera tryoni (Diptera: Tephritidae): What do we know to assist pest management?
Publisher: Wiley
Date: 02-11-2011
Competition between Diachasmimorpha kraussii and Fopius arisanus in Bactrocera tryoni: does native parasitoid-host association matter?
Publisher: Springer Science and Business Media LLC
Date: 24-11-2021
Preference among four Bactrocera species (Diptera: Tephritidae) by Diachasmimorpha kraussii (Fullaway) (Hymenoptera: Braconidae)
Publisher: Wiley
Date: 11-2010
Rh6 gene modulates the visual mechanism of host utilization in fruit fly Bactrocera minax
Publisher: Wiley
Date: 28-12-2018
DOI: 10.1002/PS.5278
Abstract: Vision plays a critical role in host location and oviposition behavior for herbivorous insects. However, the molecular mechanisms underlying visual regulation in host recognition and oviposition site selection in insects remains unknown. The aim of this study was to explore the key visual genes that are linked to the host plant location of the fruit fly, Bactrocera minax. Using a host specialist fruit fly, B. minax, which lays eggs only into immature green citrus fruit, we undertook behavioral, transcriptomic, and RNAi research to identify the molecular basis for host fruit color recognition. In laboratory and field assays we found that adults prefer green over other colors, and this preference is significantly increased in sexually mature over immature flies. Furthermore, we identified that the Rh6 gene, responsible for green spectral sensitivity, has elevated expression in mature flies over immature flies. RNAi suppression of Rh6 eliminated the preference for green, resulting in a significant decrease in the number of eggs laid by B. minax in green unripe citrus. These results show that the Rh6 gene modulates the visual mechanism of host utilization in B. minax, providing a genetic basis for visual host location in a non-model insect herbivore. © 2018 Society of Chemical Industry.
Cuelure but not zingerone make the sex pheromone of male Bactrocera tryoni (Tephritidae: Diptera) more attractive to females
Publisher: Elsevier BV
Date: 09-2014
DOI: 10.1016/J.JINSPHYS.2014.06.015
Abstract: In tephritid fruit flies of the genus Bactrocera Macquart, a group of plant derived compounds (sensu lo 'male lures') enhance the mating success of males that have consumed them. For flies responding to the male lure methyl eugenol, this is due to the accumulation of chemicals derived from the male lure in the male rectal gland (site of pheromone synthesis) and the subsequent release of an attractive pheromone. Cuelure, raspberry ketone and zingerone are a second, related group of male lures to which many Bactrocera species respond. Raspberry ketone and cuelure are both known to accumulate in the rectal gland of males as raspberry ketone, but it is not known if the emitted male pheromone is subsequently altered in complexity or is more attractive to females. Using Bactrocera tryoni as our test insect, and cuelure and zingerone as our test chemicals, we assess: (i) lure accumulation in the rectal gland (ii) if the lures are released exclusively in association with the male pheromone and (iii) if the pheromone of lure-fed males is more attractive to females than the pheromone of lure-unfed males. As previously documented, we found cuelure was stored in its hydroxyl form of raspberry ketone, while zingerone was stored largely in an unaltered state. Small but consistent amounts of raspberry ketone and β-(4-hydroxy-3-methoxyphenyl)-propionic acid were also detected in zingerone-fed flies. Males released the ingested lures or their analogues, along with endogenous pheromone chemicals, only during the dusk courtship period. More females responded to squashed rectal glands extracted from flies fed on cuelure than to glands from control flies, while more females responded to the pheromone of calling cuelure-fed males than to control males. The response to zingerone treatments in both cases was not different from the control. The results show that male B. tryoni release ingested lures as part of their pheromone blend and, at least for cuelure, this attracts more females.
Preference and performance of Diachasmimorpha kraussii (Fullaway) (Hymenoptera: Braconidae) on five commercial fruit species
Publisher: Wiley
Date: 13-03-2011
Transcriptome Profiling of Sexual Maturation and Mating in the Mediterranean Fruit Fly, Ceratitis capitata
Publisher: Public Library of Science (PLoS)
Date: 27-01-2012
Converse bergmann cline in a Eucalyptus herbivore, Paropsis atomaria Olivier (Coleoptera: Chrysomelidae): Phenotypic plasticity or local adaptation?
Publisher: Wiley
Date: 09-01-2008
Spatial and temporal partitioning of behaviour by adult dacines: direct evidence for methyl eugenol as a mate rendezvous cue for Bactrocera cacuminata
Publisher: Wiley
Date: 28-08-2003
Learning Influences Host Versus Nonhost Discrimination and Postalighting Searching Behavior in the Tephritid Fruit Fly Parasitoid Diachasmimorpha kraussii (Hymenoptera: Braconidae)
Publisher: Oxford University Press (OUP)
Date: 27-02-2018
DOI: 10.1093/JEE/TOY033
Abstract: Compared with the extensive body of research on the olfactory behavior of parasitoids of leaf-feeding insects, less is known about the fine-tuning of olfactory behavior in parasitoids that use fruit-feeding insects as hosts. We investigated whether a tephritid fruit fly parasitoid, Diachasmimorpha kraussii (Fullaway) (Hymenoptera: Braconidae), could discriminate between odors of fruits infested by larvae of a host species, Bactrocera tryoni (Froggatt) (Diptera: Tephritidae), compared to fruits infested by non-host larvae, Drosophila melanogaster (Diptera: Drosophilidae). Female wasps showed a significant preference for nectarines infested with B. tryoni, over uninfested fruits or fruits infested with D. melanogaster. When wasps were given prior experience of host or nonhost infested fruit, females demonstrated an increased ability to discriminate between host and nonhost related odors, but only when they were conditioned on host-infested (as opposed to nonhost infested) fruit. Insects provided with both host and nonhost stimuli showed no greater discriminatory learning compared to those provided with the rewarding stimuli alone. Previous experience also influenced postalighting behavior. Naïve females, and females with experience ovipositing at the top of fruit, oriented preferentially to the top of fruits upon alighting, while those with experience ovipositing at the base of fruits showed a significant difference in orientation, with 70% of wasps orientating preferentially toward the base. Similar learning-related changes were seen in search time and probing behavior. We discuss how pre- and post-alighting learning fine-tunes the behavioral responses of foraging wasps to their local environment.
Population dynamics, diet and pest status of the grassland melomys (Melomys burtoni) in northern Queensland sugarcane crops
Publisher: CSIRO Publishing
Date: 2011
DOI: 10.1071/WR10171
Abstract: Context In far-northern Queensland, Melomys burtoni and M. cervinipes occur within sugarcane crops and adjacent habitats and are potentially damaging to sugarcane. Aims To examine the population dynamics and diet of Melomys spp. within sugarcane crops so that, in conjunction with cane-stalk damage assessments, their pest status could be determined and information provided relevant to the development of sustainable pest-management tools. Methods Eight sites within sugarcane fields, four adjacent to grassland and four adjacent to closed forest, were established around Tully in far-northern Queensland. We examined demographic characteristics of all rodents (the two Melomys spp. and Rattus sordidus) within the crops by capture–release studies. Snap-trapping and dissection studies, along with weed-biomass surveys, were conducted for diet analysis, whereas damaged stalk counts were undertaken to understand the damage process. Fieldwork commenced within a fully developed crop, then continued through the annual harvest period and all subsequent crop growth stages to the next harvest. S ling was undertaken monthly from February 2005 to April 2006. Key results Melomys cervinipes was rarely caught in sugarcane and should not be regarded as a pest. In contrast, M. burtoni feeds on sugarcane and was responsible for damage to ~6% of stalks. In sites adjacent to closed forest, R. sordidus was found in higher numbers than was M. burtoni in Crop stages 2–4. However, at sites adjacent to grassland, numbers of M. burtoni increased in Crop stage 4, and before crop harvest, M. burtoni was found in higher numbers than was R. sordidus. M. burtoni colonised sugarcane at later stages of crop development than did R. sordidus. Although the level of M. burtoni reproduction was lower than that of R. sordidus, the highest proportion of pregnant M. burtoni in iduals occurred during the later stages of crop development, corresponding directly with the highest proportion of juvenile recruitment. Conclusions Of the two Melomys species found in northern Queensland sugarcane crops, only M. burtoni should be regarded as a pest. This rodent breeds and feeds within the crop, primarily after canopy closure. M. burtoni captures were roughly equivalent irrespective of adjacent habitat type, whereas R. sordidus, the traditionally recognised major pest of sugarcane crops, was found in significantly higher numbers in sugarcane adjacent to closed forest. Implications The integrated pest-management (IPM) strategy developed for R. sordidus is centred on the early stages of crop development and includes population monitoring, in-crop weed control, harbourage management and strategic use of permitted rodenticides. The late colonisation and lower breeding potential of M. burtoni mean that the IPM strategy for R. sordidus will not be directly transferable to M. burtoni.
Fruit and vegetable movement on domestic flights in Papua New Guinea and the risk of spreading pest fruit-flies (Diptera: Tephritidae)
Publisher: Informa UK Limited
Date: 2004
Biology and Management of Bactrocera and Related Fruit Flies
Publisher: CABI
Date: 2019
Size variation in wild Bactrocera tryoni (Diptera: Tephritidae): only a small amount is related to the host fruit
Publisher: Wiley
Date: 19-08-2021
DOI: 10.1111/AEN.12567
Abstract: Body size is an indicator of fitness in fruit flies (Diptera: Tephritidae), with larger males and females having increased mating success and egg production, respectively. Based on laboratory studies, the larval diet and its nutritional composition are considered the most important factors influencing juvenile growth and subsequent adult body size. However, a very limited literature is less clear on the importance of larval diet as an adult size modifier of wild fruit flies. Bactrocera tryoni (Froggatt) is a polyphagous species with larvae feeding within the fruit of over 200 plant species. To test the impact of larval host on adult size in wild in iduals of this species, we collected naturally infested fruit from the field and then reared out adults in the laboratory. The wing length and dry body weight of emergent flies were measured. Linear mixed models were used to analyse the difference in size depending on fruit type, larval density, sex and their interactions. Separate measurements of body size, wing length and dry body weight were significantly influenced by the larval host fruit collected from the field. However, only 7% and 24% of the variation of the wing discal–medial cell length and dry body weight, respectively, could be explained by larval host fruit type with high in idual body size variation both within and between host fruit types. Fruit protein content was positively correlated, and water content negatively correlated, to wing discal–medial cell length. Unexpectedly, the parameters of wing length and dry body weight were only weakly correlated with each other. The results support the large body of laboratory‐based fruit fly diet work, which identifies protein as a key component of the larval diet, but do not support a general assumption that larval host is the key driver of adult body size variation in wild frugivorous tephritids. Rather, and in agreement with a small number of laboratory‐based trials, the importance of larval diet to adult fitness appears to become less important as the larval feeding environment becomes more complex.
Effect of body size, age, and premating experience on male mating success in Bactrocera tryoni (Diptera: Tephritidae)
Publisher: Oxford University Press (OUP)
Date: 04-07-2017
DOI: 10.1093/JEE/TOX186
Abstract: Variation in male body size, age, and prior sexual experience may all influence male mating success in tephritid fruit flies. Bactrocera tryoni (Froggatt) is an Australian pest tephritid for which the sterile insect technique (SIT) is being actively pursued, and for which information on what makes males more competitive is urgently needed. Pair-wise competitive mating trials were run using laboratory-reared flies in walk-in field cages, evaluating young, large, and virgin B. tryoni males against old, small, and nonvirgin males, respectively. Analysis of male sexual competitiveness indices revealed that young and large males obtained significantly more copulations compared to old and small males there was no significant difference between virgin and nonvirgin males in obtaining mates. While SIT programs will always release young males, the results do show that rearing programs which focus on producing larger males, rather than greater numbers of smaller males, will produce more sexually competitive males. After release, virgin SIT males will not be at a competitive disadvantage with sexually experienced males based on prior mating experience.
Scale‐appropriate spatial modelling to support area‐wide management of a polyphagous fruit fly (Diptera: Tephritidae)
Publisher: Wiley
Date: 30-10-2019
DOI: 10.1111/AAB.12548
Aversive responses of Queensland fruit flies towards larval-infested fruits are modified by fruit quality and prior experience
Publisher: Elsevier BV
Date: 05-2021
A high‐throughput detection method for invasive fruit fly (D iptera: T ephritidae) species based on microfluidic dynamic array
Publisher: Wiley
Date: 05-07-2016
Abstract: Invasive species can be detrimental to a nation's ecology, economy and human health. Rapid and accurate diagnostics are critical to limit the establishment and spread of exotic organisms. The increasing rate of biological invasions relative to the taxonomic expertise available generates a demand for high-throughput, DNA-based diagnostics methods for identification. We designed species-specific qPCR primer and probe combinations for 27 economically important tephritidae species in six genera (Anastrepha, Bactrocera, Carpomya, Ceratitis, Dacus and Rhagoletis) based on 935 COI DNA barcode haplotypes from 181 fruit fly species publically available in BOLD, and then tested the specificity for each primer pair and probe through qPCR of 35 of those species. We then developed a standardization reaction system for detecting the 27 target species based on a microfluidic dynamic array and also applied the method to identify unknown immature s les from port interceptions and field monitoring. This method led to a specific and simultaneous detection for all 27 species in 7.5 h, using only 0.2 μL of reaction system in each reaction chamber. The approach successfully discriminated among species within complexes that had genetic similarities of up to 98.48%, while it also identified all immature s les consistent with the subsequent results of morphological examination of adults which were reared from larvae of cohorts from the same s les. We present an accurate, rapid and high-throughput innovative approach for detecting fruit flies of quarantine concern. This is a new method which has broad potential to be one of international standards for plant quarantine and invasive species detection.
A transcriptome-based analytical workflow for identifying loci for species diagnosis: a case study with Bactrocera fruit flies (Diptera: Tephritidae)
Publisher: Wiley
Date: 20-11-2019
DOI: 10.1111/AEN.12321
The “sequential cues hypothesis”: a conceptual model to explain host location and ranking by polyphagous herbivores
Publisher: Wiley
Date: 12-09-2020
Abstract: Successfully locating a host plant is crucial for an insect herbivore to feed and/or oviposit. However, locating a host within a complex environment that may contain an array of different plant species is a difficult task. This is particularly the case for polyphagous herbivores, which must locate a host within environments that may simultaneously contain multiple suitable and unsuitable hosts. Here we review the mechanisms of host selection used by polyphagous herbivores, as well as exploring how prior experience may modify a generalist's response to host cues. We show that recent research demonstrates that polyphagous herbivores have the capacity to detect both common cues from multiple host species, as well as specific cues from in idual host species. This creates a paradox in that generalists invariably rank hosts when given a choice, a finding at odds with the "neural limitations" hypothesis that says generalist insect herbivores should not have the neural capacity to identify cues specific to every possible host. To explain this paradox we propose a model, akin to parasitoid host location, that postulates that generalist herbivores use different cues sequentially in host location. We propose that initially common host cues, associated with all potential hosts, are used to place the herbivore within the host habitat and that, in the absence of any other host cues, these cues are sufficient in themselves to lead to host location. As such they are true "generalist" cues. However, once within the host habitat, we propose that the presence of a smaller group of cues may lead to further host searching and the location of preferred hosts: these are "specialist" cues. This model explains the current conflict in the literature where generalists can respond to both common and specific host-plant cues, while also exhibiting specialist and generalist host use behavior under different conditions.
Fruit fly parasitoids (Hymenoptera: Braconidae) in south‐east Queensland, Australia
Publisher: Wiley
Date: 19-08-2021
DOI: 10.1111/AEN.12565
Abstract: Opiine braconids include natural enemies of tephritid fruit flies, and interest in their greater utilisation for fruit fly control is growing. However, there is a lack of basic data on the prevalence and impact of these wasps for most regions of Australia. We s led fruit fly host fruits from urbanised and peri‐urban locations of south‐east Queensland and reared out parasitoids and their host flies to determine the regional parasitoid community and how parasitism varied across time and habitat type. A total of 4969 fruits were collected from which 21 277 tephritid puparia were obtained. Of 12 601 fruit flies that emerged, the Queensland fruit fly, Bactrocera tryoni , was the dominant species. A total of 5736 parasitoids, representing four species, were recovered from both suburban and peri‐urban sites. For all s les combined, the average parasitism rate was 30%. The exotic, egg–larval–pupal parasitoid Fopius arisanus represented 81% of the parasitoids collected and was recovered from all of the 13 host fruit species s led. The second most common species, the native larval–pupal parasitoid, Diachasmimorpha kraussii , represented 15% of recovered parasitoids and was collected from a smaller range of host fruit species. The remaining two parasitoids, Diachasmimorpha tryoni and Psyttalia fijiensis , were rare in s les. Parasitoid infestation was highly variable across s les, with higher rates of parasitism observed from October to May. A targeted field experiment to measure differences in parasitism by D. kraussii between urban and peri‐urban habitats detected no variation in the abundance of D. kraussii across habitats, a result consistent with the general survey. The data show that for south‐east Queensland, parasitoids are a significant fruit fly mortality factor in both peri‐urban and urban landscapes. Any manipulation of parasitoids for regional pest management should focus on conservation of F. arisanus .
Phytosanitary Treatments AgainstBactrocera dorsalis(Diptera: Tephritidae): Current Situation and Future Prospects
Publisher: Oxford University Press (OUP)
Date: 27-12-2016
DOI: 10.1093/JEE/TOW247
Abstract: Bactrocera dorsalis (Hendel) (Diptera: Tephritidae) is arguably the most important tephritid attacking fruits after Ceratitis capitata (Wiedemann) (Diptera: Tephritidae). In 2003 it was found in Africa and quickly spread to most of the sub-Saharan part of the continent, destroying fruits and creating regulatory barriers to their export. The insect is causing new nutritional and economic losses across Africa, as well as the losses it has caused for decades in infested areas of Asia, New Guinea, and Hawaii. This new panorama represents a challenge for fruit exportation from Africa. Phytosanitary treatments are required to export quarantined commodities out of infested areas to areas where the pest does not exist and could become established. This paper describes current phytosanitary treatments against B. dorsalis and their use throughout the world, the development of new treatments based on existing research, and recommendations for further research to provide phytosanitary solutions to the problem.
Is a mango just a mango? Testing within-fruit oviposition site choice and larval performance of a highly polyphagous fruit fly
Publisher: Springer Science and Business Media LLC
Date: 19-11-2010
Conservation biological control of the fruit fly parasitoid Fopiusa arisanus (Hymenoptera: Braconidae)
Publisher: Wiley
Date: 17-07-2022
DOI: 10.1111/AEN.12614
Abstract: Fopius arisanus is a parasitoid of Bactrocera fruit flies. In sub‐tropical Australia, it can cause % parasitism of Queensland fruit fly, Bactrocera tryoni . There has been minimal research effort globally, and none in Australia, to determine how the abundance of this species can be maintained and increased through conservation biological control. We carried out three research activities aimed at conserving this species in a landscape: (i) testing mesh sizes for augmentoria, devices into which fallen fruit can be placed that capture emergent flies while allowing parasitoid release (ii) investigation of the suitability of wild tobacco, Solanum mauritianum , and wild tobacco fly, Bactrocera cacuminata , as a non‐crop refuge for the parasitoid and (iii) the value of floral resources for companion planting to increase carbohydrate sources. We determined that a mesh size of approximately 2 mm 2 retained near 100% of fruit flies while releasing ~90% of parasitoids. A readily obtainable 50% shade cloth maintained a mesh pore of this size and was confirmed as suitable for making augmentoria. In South East Queensland, the wild tobacco/wild tobacco fly system was demonstrated to host F. arisanus continuously through the year, with an annual parasitism rate of 31%, peaking in the spring at 60%. A second fruit fly parasitoid, Diachasmimorpha kraussii , was also collected from this system, but at lower levels. Fopius arisanus were able to move m from a wild tobacco patch to parasitise fruit fly‐infested fruit. None of five floral resources trialled increased wasp longevity beyond the mean of 5.3 days achieved by a water‐only control. When five additional fruit juice/fruit pulp resources were tested, only one increased wasp longevity, by 1.3 days, over the water‐only control. In contrast, wasps fed on honey and water survived for a mean of nearly 40 days. We thus concluded that in the field F. arisanus does not gain its nutritional needs from either flowers or fruit. Augmentoria offer an easily scalable tool, suitable for backyard growers through to commercial producers, which provides the control benefits of crop hygiene while not disrupting the parasitoid cycle. Where wild tobacco can be maintained without impacting the quality of farm habitat, it has great potential as a year‐round reservoir of the wasp. Companion planting to increase nectar resources is not recommended for F. arisanus conservation biological control.
The responsiveness of Bactrocera jarvisi (Diptera: Tephritidae) to two naturally occurring phenylbutaonids, zingerone and raspberry ketone
Publisher: Elsevier BV
Date: 08-2018
DOI: 10.1016/J.JINSPHYS.2018.06.004
Abstract: The males of different species of Bactrocera and Zeugodacus fruit flies are commonly attracted to plant-derived phenylpropanoids (e.g. methyl eugenol (ME)) or phenylbutanoids (e.g. raspberry ketone (RK)) but almost never to both. However, one particular plant-derived phenylbutanoid, zingerone (ZN), which possesses an intermediate chemical structure between ME and RK, weakly attracts both ME- and RK-responding fruit fly species. Bactrocera jarvisi, an Australian fruit fly species, is weakly attracted to cue lure (an analogue of RK) but strongly attracted to ZN. Here, we investigated the minimum olfactory threshold and optimum sensitivity of B. jarvisi males to ZN and RK as a function of dose, time and sexual maturation. Our results show that B. jarvisi males had a marked preferential response to ZN, with a much lower olfactory threshold and faster response time to ZN than RK. Probit analysis demonstrated that ZN was at least >1600× more potent than RK as a male attractant to B. jarvisi. Although fruit fly male attraction to the phytochemicals is generally associated with sexual maturity, in B. jarvisi immature males were also attracted to ZN. Our results suggest that B. jarvisi males have a fine-tuned olfactory response to ZN, which appears to play a central role in the chemical ecology of this species.
Effects of laboratory colonization on Bactrocera dorsalis (Diptera, tephritidae) mating behaviour: ‘what a difference a year makes’
Publisher: Pensoft Publishers
Date: 26-11-2015
Sexual selection in true fruit flies (Diptera: Tephritidae): Transcriptome and experimental evidences for phytochemicals increasing male competitive ability
Publisher: Wiley
Date: 09-2014
DOI: 10.1111/MEC.12880
Abstract: In male tephritid fruit flies of the genus Bactrocera, feeding on secondary plant compounds (sensu lato male lures = methyl eugenol, raspberry ketone and zingerone) increases male mating success. Ingested male lures alter the male pheromonal blend, normally making it more attractive to females and this is considered the primary mechanism for the enhanced mating success. However, the male lures raspberry ketone and zingerone are known, across a erse range of other organisms, to be involved in increasing energy metabolism. If this also occurs in Bactrocera, then this may represent an additional benefit to males as courtship is metabolically expensive and lure feeding may increase a fly's short-term energy. We tested this hypothesis by performing comparative RNA-seq analysis between zingerone-fed and unfed males of Bactrocera tryoni. We also carried out behavioural assays with zingerone- and cuelure-fed males to test whether they became more active. RNA-seq analysis revealed, in zingerone-fed flies, up-regulation of 3183 genes with homologues transcripts to those known to regulate intermale aggression, pheromone synthesis, mating and accessory gland proteins, along with significant enrichment of several energy metabolic pathways and gene ontology terms. Behavioural assays show significant increases in locomotor activity, weight reduction and successful mating after mounting all direct/indirect measures of increased activity. These results suggest that feeding on lures leads to complex physiological changes, which result in more competitive males. These results do not negate the pheromone effect, but do strongly suggest that the phytochemical-induced sexual selection is governed by both female preference and male competitive mechanisms.
Fruit Fly Larval Survival in Picked and Unpicked Tomato Fruit of Differing Ripeness and Associated Gene Expression Patterns
Publisher: MDPI AG
Date: 10-05-2022
Abstract: The larvae of frugivorous tephritid fruit flies feed within fruit and are global pests of horticulture. With the reduced use of pesticides, alternative control methods are needed, of which fruit resistance is one. In the current study, we explicitly tested for phenotypic evidence of induced fruit defences by running concurrent larval survival experiments with fruit on or off the plant, assuming that defence induction would be stopped or reduced by fruit picking. This was accompanied by RT-qPCR analysis of fruit defence and insect detoxification gene expression. Our fruit treatments were picking status (unpicked vs. picked) and ripening stage (colour break vs. fully ripe), our fruit fly was the polyphagous Bactrocera tryoni, and larval survival was assessed through destructive fruit s ling at 48 and 120 h, respectively. The gene expression study targeted larval and fruit tissue s les collected at 48 h and 120 h from picked and unpicked colour-break fruit. At 120 h in colour-break fruit, larval survival was significantly higher in the picked versus unpicked fruit. The gene expression patterns in larval and plant tissue were not affected by picking status, but many putative plant defence and insect detoxification genes were upregulated across the treatments. The larval survival results strongly infer an induced defence mechanism in colour-break tomato fruit that is stronger/faster in unpicked fruits however, the gene expression patterns failed to provide the same clear-cut treatment effect. The lack of conformity between these results could be related to expression changes in uns led candidate genes, or due to critical changes in gene expression that occurred during the uns led periods.
Ecology and Behavior of First Instar Larval Lepidoptera
Publisher: Annual Reviews
Date: 2002
DOI: 10.1146/ANNUREV.ENTO.47.091201.145220
Abstract: ▪ Abstract Neonate Lepidoptera are confronted with the daunting task of establishing themselves on a food plant. The factors relevant to this process need to be considered at spatial and temporal scales relevant to the larva and not the investigator. Neonates have to cope with an array of plant surface characters as well as internal characters once the integument is ruptured. These characters, as well as microclimatic conditions, vary within and between plant modules and interact with larval feeding requirements, strongly affecting movement behavior, which may be extensive even for such small organisms. In addition to these factors, there is an array of predators, pathogens, and parasitoids with which first instars must contend. Not surprisingly, mortality in neonates is high but can vary widely. Experimental and manipulative studies, as well as detailed observations of the animal, are vital if the subtle interaction of factors responsible for this high and variable mortality are to be understood. These studies are essential for an understanding of theories linking female oviposition behavior with larval survival, plant defense theory, and population dynamics, as well as modern crop resistance breeding programs.
A generic individual-based spatially explicit model as a novel tool for investigating insect-plant interactions: A case study of the behavioural ecology of frugivorous tephritidae
Publisher: Public Library of Science (PLoS)
Date: 21-03-2016
Resolving cryptic species complexes of major tephritid pests
Publisher: Pensoft Publishers
Date: 26-11-2015
VARIEGATED THISTLE (SILYBUM MARIANUM (L.)), A NON‐CROP HOST PLANT OF NEZARA VIRIDULA (L.) (HEMIPTERA: PENTATOMIDAE) IN SOUTHEASTERN QUEENSLAND
Publisher: Wiley
Date: 02-1993
Integrative taxonomy versus taxonomic authority without peer review: the case of the O riental fruit fly, Bactrocera dorsalis (T ephritidae)
Publisher: Wiley
Date: 11-07-2017
DOI: 10.1111/SYEN.12250
Thermal requirements, field mortality and population phenology modelling of Paropsis atomaria Olivier, an emergent pest in subtropical hardwood plantations
Publisher: Elsevier BV
Date: 05-2008
A polyphagous, tropical insect herbivore shows strong seasonality in age-structure and longevity independent of temperature and host availability
Publisher: Springer Science and Business Media LLC
Date: 06-2021
DOI: 10.1038/S41598-021-90960-7
Abstract: Bactrocera tryoni is a polyphagous fruit fly that is predicated to have continuous breeding in tropical and subtropical Australia as temperature and hosts are not limiting. Nevertheless, in both rainforest and tropical agricultural systems, the fly shows a distinct seasonal phenology pattern with an autumn decline and a spring emergence. Temperature based population models have limited predictive capacity for this species and so the driver(s) for the observed phenology patterns are unknown. Using a demographic approach, we studied the age-structure of B. tryoni populations in subtropical Australia in an agricultural system, with a focus on times of the year when marked changes in population abundance occur. We found that the age-structure of the population varied with season: summer and autumn populations were composed of mixed-age flies, while late-winter and early-spring populations were composed of old to very old in iduals. When held at a constant temperature, the longevity of adult reference cohorts (obtained from field infested fruits) also showed strong seasonality the adults of spring and early autumn populations were short-lived, while late autumn and late winter adults were long-lived. While still expressing in modified landscapes, the data strongly suggests that B. tryoni has an endogenous mechanism which would have allowed it to cope with changes in the breeding resources available in its endemic monsoonal rainforest habitat, when fruits would have been abundant in the late spring and summer (wet season), and rare or absent during late autumn and winter (dry season).
Role of foliar chemistry versus leaf-tip morphology in egg-batch placement by Chrysophtharta bimaculata (Olivier) (Coleoptera: Chrysomelidae)
Publisher: Wiley
Date: 04-2003
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