General situation
Temperatures over the past few weeks have been in the 80s and 90s, ideal conditions for thrips development. The hot weather coming up is also expected to accelerate thrips development and activity. I'm seeing some TSWV infection in nearly every field in Yolo and Solano counties that I visit, though generally at low (<1%) incidence.
Thrips population and outlook
We're in generation 3, with adults predicted to peak in the next week or so and generation 4 adults to peak in early July. Generations 3 and 4 represent the major risk of TSWV getting into crops before fruit set, so if you're planning to use insecticides to knock down thrips numbers, the next month or so is an important period. TSWV is only likely to reduce yields when infection occurs during or before fruit set, so all but very late-planted fields should be far enough along by Generation 5 (predicted to come towards the end of July) to shrug off any new strikes.
