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Highlights from the recent Thrips/TSWV Status Blogs:
Patricia Lazicki, noting conditions as of April 30th for Yolo & Colusa Counties: "In typical years like this is shaping up to be so far, our normal recommendation is that if you don't know of any local sources of TSWV and crops are not in the ground or are just planted it might be worth delaying any treatment until mid-June. It would allow generation 3 adults to breed and lay eggs, but will catch juveniles developing from generation 3 eggs and suppress the spread of any TSWV that has come into crops with generation 3 adults. If you do have local sources of TSWV, or if you've planted early and are worried about early entry of TSWV to your crop, consider treatments in weeks 2 or 3 of May to suppress generation 3 thrips, which could be carrying TSWV."
Neal McRoberts, noting conditions as of May 1st for the San Joaquin Valley: "We are expecting generation 2 adults to peak in the next few days. If temperatures stay on track generation 3 will likely see its peak adult numbers in the first week of June. We have now had confirmed TSWV cases in the southern San Joaquin Valley and the Sacramento Valley, so this seems like a year when targeting generation 3 will give useful benefits. Generation 3 juveniles will be feeding and developing over the rest of May, so treatments applied in the second half of the month will have a chance to prevent infected adults from spreading the virus to new hosts. If you are considering investing in a thrips treatment this season, the second half of May appears to be a good time to make that treatment."
Check out the links below for more details.
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