A5101918176- Insect-Plant Interactions and Control
- Insect Pheromone Research and Control
- Insect and Pesticide Research
- Insect Resistance and Genetics
- Insect and Arachnid Ecology and Behavior
- Plant and animal studies
- Insect Pest Control Strategies
- Neurobiology and Insect Physiology Research
- Agricultural pest management studies
- Forest Insect Ecology and Management
- Nematode management and characterization studies
- Entomopathogenic Microorganisms in Pest Control
- Insect symbiosis and bacterial influences
- Sunflower and Safflower Cultivation
- Weed Control and Herbicide Applications
- Agriculture, Plant Science, Crop Management
- Plant Parasitism and Resistance
- Allelopathy and phytotoxic interactions
- Diptera species taxonomy and behavior
- Dengue and Mosquito Control Research
- Insect behavior and control techniques
- Lepidoptera: Biology and Taxonomy
- Biological Activity of Diterpenoids and Biflavonoids
- Plant Virus Research Studies
- Viral-associated cancers and disorders
North Dakota State University
2012-2024
Dakota State University
2024
Rothamsted Research
2006-2022
University of Birmingham
2019
Barrie Urology Group
2018
University of Nevada, Reno
2018
Le Studium
2017
Universität Hamburg
2004
Cornell University
2004
Plant & Food Research
1993-2000
Myzus persicae is a globally important aphid pest with history of developing resistance to insecticides. Unusually, neonicotinoids have remained highly effective as control agents despite nearly two decades steadily increasing use. In this study, clone M. collected from southern France was found, for the first time, exhibit sufficiently strong result in loss field effectiveness neonicotinoids. Bioassays, metabolism and gene expression studies implied presence mechanisms resistant clone, one...
The voltage‐gated sodium channel is the primary target site of DDT and pyrethroid insecticides, point mutations in domain II region protein have been implicated knockdown resistant (kdr ) phenotype several insect species. Here, we report that one these mutations, a leucine‐to‐phenylalanine replacement transmembrane segment IIS6, also found certain insecticide‐resistant clones peach‐potato aphid, Myzus persicae. mutation was present four with amplified E4 esterase genes, but absent from both...
Abstract The polyphagous leafroller moth, Epiphyas postvittana , is a pest of many fruit crops in New Zealand. Since the larva highly mobile, host selection this insect may involve both adult female and larva. In order to test relative importance neonate plants, ovipositional preferences females, or acceptances larvae towards 26 plant species, consisting 15 plants considered hosts 11 not hosts, were investigated. tests, mean females for non‐hosts very similar. contrast, showed significantly...
The grain aphid, Sitobion avenae Fabricius (Hemiptera: Aphididae), is an important pest of cereal crops. Pesticides are the main method for control but carry risk selecting resistance. In response to reports reduced efficacy pyrethroid sprays applied S. avenae, field samples were collected and screened mutations in voltage-gated sodium channel, primary target site pyrethroids. Aphid mobility mortality lambda-cyhalothrin measured coated glass vial bioassays.A single amino acid substitution...
Abstract BACKGROUND: Parthenogenetic clones of the green peach aphid, Myzus persicae (Sulzer), and cotton Aphis gossypii Glover, were tested with anthranilic diamide insecticide cyantraniliprole (i.e. DuPont ™ Cyazypyr ) in systemic‐uptake bioassays to investigate potential for cross‐resistance conferred by mechanisms resistance organophosphates, carbamates pyrethroids and, case M. , reduced sensitivity neonicotinoids. These data compared response field samples A. collected from around...
Abstract Laboratory bioassays applying the neonicotinoid insecticides imidacloprid, acetamiprid and nitenpyram against clones of peach‐potato aphid Myzus persicae (Sulzer) demonstrated that these compounds effectively circumvent known carboxylesterase, modified acetylcholinesterase (MACE) knock‐down (kdr) insecticide resistance mechanisms in this species. However, some showed cross‐tolerance (up to 18‐fold) relative susceptible standards. A survey assessing frequency tolerance M UK, based on...
1. Phenotypic diversity is the fuel that powers evolution. 2. Asexual organisms rely on mutation whereas sexual combine with recombination. 3. Few provide examples of species are both and asexual, but aphids do. 4. To examine evolution perceptible timescales requires strong evolutionary forces and, as Darwin noted, agricultural practices selection. In case aphids, insecticides a considerable force in elimination genotypes. 5. Insecticide resistance Myzus persicae (Sulzer) has arisen...
Abstract The survival of Myzus persicae (Sulzer) clones, representing the full range recognized levels insecticide resistance, was measured after 3–4 week exposure to winter climate in field. Ten separate trials were carried out using known numbers first/second instar nymphs on unsprayed oilseed rape and groundsel. These predominantly showed a negative association between resistance level proportion aphids recovered alive exposure. strength relationship correlated closely with three...
Abstract Response to the alarm pheromone, ( E )-β-farnesene, produced by many species of aphids, was assessed in laboratory bioassays using an aphid pest, Myzus persicae (Sulzer), and its primary endoparasitoid, Diaeretiella rapae (McIntosh). This done three separate studies, first investigating responses a large number M. clones carrying different combinations metabolic (carboxylesterase) target site (kdr) insecticide resistance mechanisms, other two young virgin female adult parasitoids....
Abstract The well-established carboxylesterase-based resistance to insecticides in Myzus persicae Sulzer has recently been accentuated by the appearance of aphids with a modified acetylcholinesterase (MACE) insensitive pirimicarb and novel aphicide, triazamate. This target site mechanism was found M. from crops UK for first time 1996, together especially large proportions R 2 3 levels carboxylesterases, combination that associated serious insecticide failures. paper describes incidence both...
Abstract Apterous aphids need to move from ageing younger leaves in order survive UK winters. This behaviour was studied at low temperatures field and laboratory trials using Myzus persicae (Sulzer) clones representing all five recognized categories of esterase-based insecticide resistance found populations. Both studies showed that the tendency deteriorating inversely related their level. maladaptive associated with greater could lead increased risks becoming separated plants after leaf...
Abstract With the use of deuterium‐labeled saturated fatty acids coupled with gas chromatography‐mass spectrometric analysis, biosynthesis sex pheromone component (Z)‐8‐tetradecenyl acetate in greenheaded leafroller moth Planotortrix excessana was shown to proceed via Δ10 desaturation palmitate. The resultant (Z)‐10‐hexadecenoate is two carbon chain‐shortened precursor (Z)‐8‐tetradecenoate. minor (Z)‐10‐tetradecenyl biosynthesized by myristate. This first confirmation an eukaryotic system.
Long-distance, female-produced sex pheromones are widespread among moths. Larval feeding provides most of the nutrients for development these insects but is not thought to influence de novo production fatty-acid derived compounds used as by species. Feeding on plant nectar (sugar) adult moths important increasing female fitness and also pollination many In this paper, I show that sucrose solution, opposed water, increases pheromone titre in mated, virgin, Heliothis virescens. Mating caused a...
A novel beta-lactone, vittatalactone (1), was isolated from collections of airborne volatile compounds feeding male striped cucumber beetles, Acalymma vittatum. The structure 1 determined to be (3R,4R)-3-methyl-4-(1,3,5,7-tetramethyloctyl)oxetan-2-one by microderivatization, GC-MS, and NMR studies. absolute configurations at C-2 C-3 on the beta-lactone ring were assigned use modified Mosher method, applied beta-hydroxy acid methyl ester resulting methanolysis 1. Biological activity 1,...