Location: Horticultural Crops Research
Project Number: 5358-22000-034-14-G
Project Type: Grant
Start Date: Aug 20, 2009
End Date: Sep 30, 2012
1. Optimize spray timing for eriophyid pest mite populations. 2. Determine impact of low-impact fungicide spray regimes on pest and predatory mite populations. 3. Determine impact of often used fungicides on predatory mite population density, mortality (juvenile and adult), fecundity, oviposition rate and longevity.
Efficacy spray trials will be conducted in vineyards with known eriophyid pest mite infestations to determine the optimal timing for control of rust and bud mite pest populations in vineyards and minimize damage during early season. Field trials will be conducted to examine the effects of reduced fungicide use on the development of mite populations and powdery mildew disease development. Field trials will be conducted with two goals in mind. Optimize (1) conventional and (2) organic seasonal fungicide spray regimes in order to mitigate mite pest populations and allow survival of beneficial arthropods such as T. pyri. Bioassays will be conducted to verify field trials using a Precision Potter Spray Tower to test the toxicity of multiple fungicides, including several often used formulations of sulfur, stylet oil, several classes of synthetic fungicides and whey powder, an alternative ‘soft’ fungicide, on T. pyri under laboratory conditions. Documents Grant with Oregon State University