A5048371691- Insect-Plant Interactions and Control
- Insect and Pesticide Research
- Insect behavior and control techniques
- Insect Resistance and Genetics
- Forest Insect Ecology and Management
- Plant and animal studies
- Insect Pest Control Strategies
- Entomopathogenic Microorganisms in Pest Control
- Insect and Arachnid Ecology and Behavior
- Evolution and Genetic Dynamics
- Research Data Management Practices
- Ecology and Vegetation Dynamics Studies
- Plant Virus Research Studies
- Scientific Computing and Data Management
- Genetic diversity and population structure
- Insect symbiosis and bacterial influences
- Hymenoptera taxonomy and phylogeny
- Early Childhood Education and Development
- Animal Behavior and Reproduction
- Psychological Well-being and Life Satisfaction
- Berry genetics and cultivation research
- Biological Control of Invasive Species
- Pharmaceutical studies and practices
- Genetic Mapping and Diversity in Plants and Animals
- Pharmacological Effects and Toxicity Studies
Agriculture and Agri-Food Canada
2021-2024
Agassiz Research and Development Centre
2021-2024
Simon Fraser University
2004-2014
University of British Columbia
2008-2014
Kwantlen Polytechnic University
2013
United States Geological Survey
2009
Abstract Reproducibility is the benchmark for results and conclusions drawn from scientific studies, but systematic studies on reproducibility of are surprisingly rare. Moreover, many modern statistical methods make use ‘random walk’ model fitting procedures, these inherently stochastic in their output. Does combination procedures current standards data archiving method reporting permit reproduction authors' results? To test this, we reanalysed sets gathered papers using software package...
The data underlying scientific papers should be accessible to researchers both now and in the future, but how best can we ensure that these are available? Here examine effectiveness of four approaches archiving: no stated archiving policy, recommending (but not requiring) archiving, two versions mandating deposition at acceptance. We control for differences between types by trying obtain from use a single, widespread population genetic analysis, structure. At one extreme, found mandated...
Abstract Recent developments of new families pesticides and growing awareness the importance wild pollinators for crop pollination have stimulated interest in potential effects novel on bees. Yet pesticide toxicity studies bees remain rare, few included long‐term monitoring bumble bee colonies or testing foraging ability after exposure. Larval feeding exogenous pollen exposed to during development may result lethal sub‐lethal adult stage. We tested a naturally derived biopesticide, spinosad,...
We provide recommendations for sampling and identification of introduced larval parasitoids spotted-wing drosophila, Drosophila suzukii (Matsumura) (Diptera: Drosophilidae). These are either under consideration importation (aka classical) biological control introductions, or their adventive (presumed to have been accidentally introduced) populations recently discovered in North America Europe. Within the context ecology D. its parasitoids, we discuss advantages disadvantages estimating...
Abstract Two species of larval parasitoids the globally invasive fruit pest, Drosophila suzukii (Diptera: Drosophilidae), Leptopilina japonica, and Ganaspis brasiliensis (both Hymenoptera: Figitidae), were detected in British Columbia, Canada 2016 2019, respectively. Both are presumed to have been unintentionally introduced from Asia; however, extent their establishment across different habitats with diverse host plants used by D. was unclear. In addition, there no knowledge temporal...
Abstract Insect pathogens can be utilized in a variety of pest management approaches, from inundative release to augmentation and classical biological control, microevolution the consideration evolutionary principles potentially influence success all these strategies. Considerable diversity exists natural entomopathogen populations this either beneficial or detrimental for suppression, depending on pathogen its mode competition, should considered selection isolates control. Target hosts...
We conducted laboratory experiments to investigate the lethal and sublethal effects of clothianidin on bumble bee, Bombus impatiens Cresson, colony health foraging ability. Bumble bee colonies were exposed 6 ppb clothianidin, representing highest residue levels found in field studies pollen, a higher dose 36 pollen. Clothianidin did not effect pollen consumption, newly emerged worker weights, amount brood or number workers, males, queens at either dose. The ability bees tested an artificial...
Abstract Methods to measure the diversity and biological control impact of parasitoids for spotted-wing drosophila, Drosophila suzukii (Matsumura) (Diptera: Drosophilidae) are being developed in support programs around world. Existing methods determine parasitism levels parasitoid species composition focus on sampling D. within fresh rotting fruit. However, many pupate soil or dropped fruit, where additional could occur their thought overwinter. Here we introduce a method extracting...
Cyclic or fluctuating populations experience regular periods of low population density. Genetic bottlenecks during these could give rise to temporal spatial genetic differentiation populations. High levels movement among increasing populations, however, ameliorate any differences and also synchronize the dynamics geographically separated We use microsatellite markers investigate four island one mainland western tent caterpillars, Malacosoma californicum pluviale, in two peak pre-peak density...
Trichoplusia ni is a subtropical moth that migrates annually from southern California to British Columbia, Canada where it invades vegetable greenhouses and field crops. The heated greenhouse environment has altered the natural extinction-recolonization dynamics of T. populations, allows year-round persistence in some locations. In addition, extensive use biopesticide, Bacillus thuringiensis subspecies kurstaki (Bt) selected for resistance. Here we investigated genetic structure populations...
Long-range migrations of many wind-borne noctuid moths will have been influenced by the expansion agriculture that provides greater availability food plants along migratory route. The migratory, agricultural pest, Trichoplusia ni (cabbage looper) over-winters in southern California and each summer migrates as far north British Columbia. We explored degree genetic connectivity populations over this range. Preliminary investigation seven mitochondrial gene regions found little to no variation...
Resistance of greenhouse-selected strains the cabbage looper, Trichoplusia ni, to Bacillus thuringiensis subsp. kurstaki was countered by a hybrid strain B. and genetically modified toxins Cry1AbMod Cry1AcMod, which lack helix alpha-1. Cry1AcMod >100-fold less than resistance native Cry1Ab Cry1Ac.
We studied the calling patterns of common true katydids (Pterophylla camellifolia) from sound recordings made during August through October 2007 in an oak-hickory forest western Maryland. Nightly frequency were determined using 1-s samples spaced five min apart. The relationship between (i.e., number twelve 1-second per hour which singing occurred) and time night, date, weather variables, was modeled logistic regression. Model predictability high (73% variance explained), with temperature...
Levels of genetic diversity can strongly influence the dynamics and evolutionary changes natural populations. Survival disease resistance have been linked to levels in eusocial insects, yet these relationships remain untested gregarious insects where transmission be high selection for is likely strong.Here we use 8 microsatellite loci examine variation 12 families western tent caterpillars, Malacosoma californicum pluviale from four different island populations determine relationship...
Abstract 1 The dispersal of susceptible insects between refuges and Bacillus thuringiensis ( Bt ) treated fields is the key to resistance management crops. Here we describe opposite situation; movement resistant Trichoplusia ni moths from over‐wintered, greenhouse populations in British Columbia (BC) exposed high use neighbouring greenhouses where sprays have not been used. 2 spread non‐selected T. , resulting increase resistance, indicates a surprising level among even face fitness costs. 3...
Abstract Spotted-wing drosophila, Drosophila suzukii , is a global pest of soft fruits that capable reproducing on wide range cultivated and wild plant species. In Canada, D. was first reported in British Columbia 2009 now widespread across the country. Understanding genetic structure populations could be important for management if there are phenotypic differences between genetically distinct populations. For example, insect respond differently to directional selection imposed by...
The strawberry blossom weevil, Anthonomus rubi (Herbst) (Coleoptera: Curculionidae), is native to Europe, Asia, and parts of North Africa, has recently established in British Columbia, Canada Washington State, USA. To determine whether any parasitoids Columbia parasitize this recently-established pest, A. rubi-infested buds Rosaceous host plants were collected reared for parasitoid emergence. Pteromalus quadridentatus Gibson n. sp. (Hymenoptera: Chalcidoidea: Pteromalidae) described from...