Thrips/TSWV status in Yolo & Colusa

General situationThe oldest tomatoes have been in ground for more than a month, and planting is progressing rapidly. The warm weather in the past two weeks has pushed thrips population projections forward by a few days compared to the last report. Thrips populationFirst-generation adults are still…

General situation, thrips population developmentPlanting is in full swing. Temperatures and precipitation this spring are close to historic norms, and the thrips population predictions are very similar to those we saw last year. We’re currently at the peak of 1st-generation adults; they’ll be laying their…

General situation Almost all tomatoes are now in the ground. New TSWV infections will cause more yield loss in later than earlier plantings since the younger the plant is when it is infected, the more severe the disease will be.

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.

General situation Above-average temperatures this week compensate for below-average temperatures last week, and thrips population projections remain similar to earlier predictions. Thrips population Generation 2 adult thrips are peaking now, and will be laying their eggs.