ORCID Profile
0000-0002-7091-8445
Current Organisations
The University of Auckland
,
University of California, Berkeley
,
AgResearch Ltd Lincoln Research Centre
,
AgResearch Ltd
,
University of Sydney
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Publisher: Elsevier BV
Date: 04-2006
Publisher: Wiley
Date: 26-01-2009
DOI: 10.1002/PS.1700
Abstract: Bradysia ocellaris (Comstock) is one of the major pests of cultivated mushrooms, Agaricus bisporus (Lange) Imbach. The feeding of sciarid fly larvae causes damage to the cultivation substrates, compost and casing. A comparative study of insecticidal treatments incorporated into compost and casing against B. ocellaris was conducted during 2003-2004. Treatments with an organophosphate, diazinon, a pyrazole, fipronil, and an insect growth regulator (IGR), triflumuron, were incorporated into casing. Another IGR, cyromazine, was incorporated into compost. Insecticidal incorporation into compost and casing has been associated with reductions in mushroom yield. Therefore, the effect of these insecticidal treatments on the overall yield was evaluated. A combined treatment, incorporation of cyromazine at 10 mg kg(-1) into compost and of triflumuron at 20 mg kg(-1) into casing, provided 100% control against B. ocellaris. There was no apparent reduction in yield as a result of incorporation of the tested chemicals into either compost or casing. The results obtained from this study suggest that incorporation of insecticides into both compost and casing is required to control a moderate to high pressure of insect pests. There were no significant yield reductions as a result of the incorporation of pesticides in the Australian mushroom-growing system.
Publisher: The American Mosquito Control Association
Date: 09-2009
DOI: 10.2987/09-0016.1
Abstract: While the use of topical insect repellents, particularly those containing synthetic active ingredients such as deet (N,N-diethyl-3-methylbenzamide), are a mainstay in personal protection strategies emphasized in public health messages, there is a growing demand in the community for alternative repellents, particularly those of botanical origin and thus deemed to be "natural." This study evaluated the repellency of essential oils from 11 Australian native plants in 5% v/v formulations against Aedes aegypti, Culex quinquefasciatus, and Culex annulirostris under laboratory conditions. A blend of the top 3 performing oils was then compared with deet and a commercially available botanical insect repellent. All essential oils provided at least some protection against the 3 mosquito species, with the longest protection time (110 min) afforded by Prostanthera melissifolia against Cx. quinquefasciatus. Mean protection times against Ae. aegypti were substantially lower than those for the Culex spp. tested. Deet provided significantly longer protection against Ae. aegypti than both the 5% v/v blend of Leptospermum petersonii, Prostanthera melissifolia, and Melaleuca alternifolia (the 3 most effective oils) and the commercial botanical repellent. The results of this study indicate that these essential oils from Australian native plants offer limited protection against biting mosquitoes and that a blend of essential oils holds may offer commercial potential as a short-period repellent or under conditions of low mosquito abundance. However, it is important that public health messages continue to emphasize the greater effectiveness of deet-based repellents in areas with risks of mosquito-borne disease.
Publisher: Wiley
Date: 28-05-2012
Publisher: CSIRO Publishing
Date: 2012
DOI: 10.1071/AN11240
Abstract: In response to suggestions that the incidence of louse infestations in New South Wales has increased markedly, a survey of 173 producers was conducted in the Tablelands Livestock Health and Pest Authority region using visual detection and a questionnaire to document retrospective lice history. An estimated apparent prevalence of 16.5% is a moderate increase from the 10% reported in 2004. On a subset of the surveyed sheep flocks sheep, lice-specific immunoassay conducted by the New South Wales Department of Primary Industries were used to detect low levels of infestation that were not identified by visual detection. This provided a true prevalence estimate of 30%. These results will be used to promote improved control and preventative strategies.
Publisher: Wiley
Date: 30-03-2022
DOI: 10.1111/JEN.13002
Abstract: Several endemic hepialid species in the genus Wiseana have become serious pests in New Zealand. Two species, in particular, reach high numbers, causing significant economic damage to pasture. Key developmental parameters for egg hatch for both species are needed along with monitoring and weather data to estimate the optimal time to apply control measures to the vulnerable early instar larvae. In this study, thermal requirements for the egg stage of Wiseana copularis and W . cervinata were determined to provide the basis of a prototype phenology model designed to improve the timing of application, therefore, the efficacy of an insect growth regulator, diflubenzuron, against early instar larvae. The standard linear regression method and the Ikemoto and Takai method of insect development were compared for the goodness of fit to the egg‐stage development of W . copularis and W . cervinata at constant temperatures to determine a developmental lower threshold ( T 0 ) and degree day (DD) requirement for the egg to the larval stage for each species. The Ikemoto and Takai method gave the highest estimate of T 0 for W . copularis at 7.9°C compared with 6.4°C for the standard regression method. For W . cervinata , the estimates ranged from 6.6°C (Ikemoto and Takai method) to 4.1°C (standard regression method). Of the two methods, the Ikemoto and Takai method had the better fit and lowest standard error for the parameters of interest. Thus, the Ikemoto and Takai model was chosen to estimate the critical parameters, T 0 and the requirement for egg‐larval development of W . copularis (7.9°C, 185 DD) and W . cervinata (6.6°C, 177 DD).
Publisher: Wiley
Date: 29-10-2008
Publisher: Informa UK Limited
Date: 28-05-2023
Publisher: Oxford University Press (OUP)
Date: 09-2017
DOI: 10.1093/JEE/TOX219
Abstract: The accumulated damage from elephant weevil larvae, Orthorhinus cylindrirostris (F.) (Coleoptera: Curculionidae), reduces blueberry yield and shortens the productive lifespan of blueberry plants by several years. Selective breeding to develop pest-resistant blueberry cultivars is a possible control option, but the relationship between O. cylindrirostris populations, plant damage, and blueberry yield has not been described. A field survey of 17 blueberry cultivars was conducted on a commercial farm to measure O. cylindrirostris populations (emergence holes and adult numbers) and yield from plants of different ages (2-12 yr). Blueberry plants accumulated damage over time, that is, older plants tended to have more O. cylindrirostris emergence holes than younger plants. All cultivars received some level of O. cylindrirostris attack but this did not always lead to yield losses. Newer cultivars that have been in production since 2000 were less susceptible to O. cylindrirostris than older cultivars. Removal of highly susceptible cultivars from commercial blueberry farms may reduce O. cylindrirostris populations. There is potential for selective breeding to increase plant resistance to O. cylindrirostris if the specific resistance mechanisms can be identified in blueberry.
Publisher: Springer Science and Business Media LLC
Date: 22-06-2006
Publisher: Frontiers Media SA
Date: 26-08-2016
Publisher: Springer Science and Business Media LLC
Date: 08-09-2018
Publisher: Wiley
Date: 10-2003
Publisher: Wiley
Date: 26-05-2004
Publisher: Wiley
Date: 28-03-2011
Publisher: Elsevier BV
Date: 02-2019
Publisher: Elsevier BV
Date: 12-2015
Publisher: Frontiers Media SA
Date: 29-11-2016
Publisher: Wiley
Date: 16-04-2008
Publisher: Elsevier BV
Date: 12-2016
Publisher: Informa UK Limited
Date: 21-11-2017
Publisher: Oxford University Press (OUP)
Date: 07-2013
DOI: 10.1673/031.013.7401
Publisher: Springer Science and Business Media LLC
Date: 07-06-2017
Publisher: Springer Science and Business Media LLC
Date: 2009
DOI: 10.1071/AP08079
Publisher: Elsevier BV
Date: 2011
Publisher: Elsevier BV
Date: 03-2004
Publisher: Scion
Date: 26-02-2016
Publisher: Wiley
Date: 28-06-2006
Publisher: Wiley
Date: 08-2008
Publisher: Oxford University Press (OUP)
Date: 03-02-2021
DOI: 10.1093/AESA/SAAA057
Abstract: The coconut rhinoceros beetle (CRB: Oryctes rhinoceros Linnaeus) is one of the most damaging pests to coconut and oil palms in Asia and the Pacific Islands. Adults bore into the crown and damage developing fronds, which affects tree development and yield. The insect is native to South and Southeast Asia and was inadvertently introduced into the Pacific in 1909. It has since spread to several Pacific island nations and territories, causing significant economic impact on these important coconut and palm-growing regions. In the 1950s and 1960s, an international biological control effort was initiated to search for and release natural enemy species. Release of the Oryctes rhinoceros nu irus Huger (OrNV) and the species complex of Metarhizium Sorokin (Hypocreales: Clavicipitaceae) was successful in controlling CRB in its invaded range. Recently a new biotype of the beetle, known as CRB-G, has spread into the Pacific Islands causing unprecedented levels of damage due to the failure of previously successful biological control agents (BCAs) to suppress this biotype. The re-emergence of CRB as a serious pest warrants a rigorous re-evaluation of potential BCAs and a new search for effective natural enemies if necessary. In this article, we review literature on CRB to 1) analyze past introductions of BCAs and their effectiveness 2) identify potentially important natural enemies and their geographical origins and 3) assess possible approaches for utilization of BCAs against the new wave of CRB invasion. Research gaps and directions deserving future attention are highlighted and a strategy for renovation of biological controls for CRB suggested.
Publisher: Springer Science and Business Media LLC
Date: 25-02-2015
Publisher: Wiley
Date: 17-02-2011
Publisher: Elsevier BV
Date: 10-2017
Publisher: Informa UK Limited
Date: 09-1998
Publisher: Wiley
Date: 08-06-2009
Publisher: Elsevier BV
Date: 02-2010
Publisher: Wiley
Date: 08-2009
Publisher: Oxford University Press (OUP)
Date: 10-2014
DOI: 10.1603/EN14122
Publisher: New Zealand Plant Protection Society
Date: 06-08-2021
DOI: 10.30843/NZPP.2021.74.11742
Abstract: An invasive population of the coconut rhinoceros beetle (Oryctes rhinoceros CRB) was discovered in Honiara, Guadalcanal, Solomon Islands in 2015. The beetle has caused severe damage to coconut palms in the outbreak area and its continued spread threatens the food security and livelihood of thousands of smallholder farmers in the region. Spread and abundance of the beetle were monitored using bucket traps baited with the aggregation pheromone, ethyl-4 methyloctanoate. Beetles were collected from traps approximately bi-weekly for two periods one during 2017–18 and the other during 2019–2020. Trap catches showed that CRB was present throughout the whole survey region with significantly higher numbers of female CRB trapped than males. Results indicate a significant 1.5-fold increase in CRB trap catch numbers from 2017–2018 to 2019–2020 despite control efforts. The number of CRB adults trapped also varied between sites and months during both time periods but with no clear patterns. Removal of breeding sites along with strong local quarantine should remain the top priority of the local government to contain CRB expansion within Solomon Islands and beyond.
Publisher: CSIRO Publishing
Date: 2017
DOI: 10.1071/CP17176
Abstract: Insecticidal seed treatments are used commonly worldwide to protect seedlings against root feeding insects. Organophosphate insecticides that have been used for seed treatments are being phased out and replaced with neonicotinoid insecticides. Concerns about the environmental impact of neonicotinoids have prompted a search for alternatives. Microbial insecticides are a biological alternative for seed treatments to target root feeding insects. Six field trials with organophosphate granules (diazinon, chlorpyrifos), neonicotinoid seed treatment (clothianidin) and microbial (Serratia entomophila) seed treatment targeting grass grub, a New Zealand scarab pest, were conducted in wheat crops at several sites over 4 years (2012–2015). Sites were selected each year that had potentially damaging populations of grass grub present during the trials. Untreated seeds led to significant losses of plants and wheat yield due to lower seedling establishment and ongoing plant losses from grass grub damage. Insecticide and microbial treatments increased plant survival in all trials compared with untreated seeds. Better plant survival was associated with higher yields from the insecticide treatments in four out of six trials. Neonicotinoid seed treatment alone gave similar yield increases to combined neonicotinoid seed treatment and organophosphate granules. Microbial seed treatment with S. entomophila gave similar yield increases to insecticide treatments in two out of six trials. Seed treatment with S. entomophila is an alternative for grass grub control however, development of a commercial product requires effective scale-up of production, further research to improve efficacy, and viability of the live bacteria needs to be maintained on coated seed.
Publisher: Wiley
Date: 07-08-2017
DOI: 10.1002/PS.4620
Abstract: Porina is the common name used to describe moths and caterpillars of the seven endemic species and three haplotypes of Wiseana in New Zealand. Several species have adapted to eating introduced pasture plants however, a paucity of defining morphological characteristics has meant that porina are grouped as indistinguishable species within a complex. This study aimed to develop non-sequencing identification methods for porina species. We sequenced 1718 bp of the mitochondrial cytochrome oxidase genes for all Wiseana species and haplotypes using 75 specimens collected from 42 sites throughout New Zealand. Two identification methods were developed the high-resolution melt method uses 106 bp of the cytochrome oxidase I gene, and the restriction fragment polymorphism method uses a larger 700 bp region from the same gene. Validation was performed on a further 275 specimens. Melt curve profiles varied more with population heterogeneity than digest results. In both methods, W. mimica and W. jocosa were inseparable. W. fuliginea grouped with W. mimica and W. jocosa in the restriction method, but the melt curve profile differed. Until now, ecological studies of porina at the species level have been implausible. Our non-sequencing based methods allow rapid identification of moths and caterpillars to species and haplotype level, paving the way for ecological studies of pasture pest species and the development of species-specific mitigation strategies. © 2017 Society of Chemical Industry.
Publisher: Wiley
Date: 15-12-2011
Publisher: Wiley
Date: 25-07-2020
DOI: 10.1002/PS.5973
Publisher: Elsevier BV
Date: 09-2002
Location: United States of America
No related grants have been discovered for Sarah Mansfield.