1a.Objectives (from AD-416):
Evaluate the effectiveness of new classes of insecticides in managing thrips populations, reducing the incidence of tomato spotted wilt virus, and for their compatibility with natural enemies.
1b.Approach (from AD-416):
The efficacy of alternative chemical insecticides and an insight on the mechanisms through which they suppress thrips feeding and TSWV incidence will be studied in detail through experiments. Experiments will also be conducted in the field in all three participating states. The feasibility of using new techniques and econometric analyses will also be conducted for all three participating states. The economic feasibility of utilizing these new chemicals in organic production will also be explored.
This research relates directly to Objective 1. Develop habitat manipulation strategies as components of IPM programs for polyphagous pests through behavioral and ecological studies of their interactions with host plants and natural enemies.
Tomato spotted wilt virus, a viral disease transmitted by thrips, is the most important pest problem for peanut producers in the southern USA. Growers have historically relied on broad spectrum organophosphate and carbamate insecticides to manage the thrips vectors of tomato spotted wilt in peanuts. However, these insecticides are in the process of being removed from the marketplace through the Food Quality and Protection Act. Therefore, scientists with USDA-ARS CMAVE and cooperators at the University of Georgia and Auburn University are conducting studies to determine if new, reduced-risk insecticides could supplant these more harmful insecticides. Field studies for the second year of this project have been established and are currently in progress to assess the efficacy of these new insecticides in comparison with organophosphate and carbamate standards. The trials include 12 different insecticide treatments applied to both a tomato spotted wilt susceptible peanut cultivar and a tomato spotted wilt tolerant cultivar.