Temperatures are predicted to peak at 100+ F at the end of this week before returning to the high 80s F early next week.  Thrips will develop rapidly under these conditions.

Thrips numbers are now high throughout the San Joaquin Valley.  In the Merced area generation 3 adults peaked on May 28th and generation 4 adults will peak around June 17th.  TSWV incidence is still low so the the next 10 days to 2 weeks are an ideal period for insecticide application if you are considering treatment for thrips/TSWV.   Spraying at this reduce generation 4 thrips and check the spread of any TSWV that is already present.

Recently planted crops are at higher risk from TSWV damage because thrips numbers are now high and the effects of the virus are more severe when plants are infected while still young.