ORCID Profile
0000-0001-8147-0626
Current Organisations
University of Queensland
,
Queensland Department of Agriculture and Fisheries
,
TAFE Queensland
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Publisher: Oxford University Press (OUP)
Date: 09-05-2017
DOI: 10.1093/JEE/TOX109
Abstract: In-field management of Bactrocera tryoni (Froggatt) and Zeugodacus cucumis (French) (Diptera: Tephritidae) in fruiting vegetable crops has relied almost exclusively on organophosphate cover sprays. Laboratory and semifield trials were performed to compare a number of alternative insecticides for efficacy against these species. A novel semifield method was used whereby the insecticides were applied to crops as cover sprays under field conditions, and treated plants bearing fruit were transferred to large cages and exposed to fruit flies. Efficacy was assessed in terms of numbers of pupae developing from treated fruit. A laboratory cage method was also used to assess effects on adult mortality and comparative effects of 1- and 3-d-aged residues. The neonicotinoids clothianidin and thiacloprid were very effective against B. tryoni and Z. cucumis. Clothianidin was the only insecticide other than dimethoate to affect adult mortality. The synthetic pyrethroid alpha-cypermethrin was also very effective, particularly in semifield trials, although higher incidence of aphid and whitefly infestation was observed in this treatment compared to others. Cyantraniliprole was effective against B. tryoni, but less effective against Z. cucumis. Imidacloprid, bifenthrin, spinetoram, and abamectin were all relatively less effective, although all demonstrated a suppressive effect.
Publisher: International Society for Horticultural Science (ISHS)
Date: 12-2015
Publisher: International Society for Horticultural Science (ISHS)
Date: 12-2015
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.
Publisher: Wiley
Date: 04-08-2017
DOI: 10.1111/AEN.12231
Location: Australia
No related grants have been discovered for Brendan Missenden.