Psyllid captures still low; one new Lso positive

ByErik Wenninger Potato Psyllid/Zebra Chip Monitoring Program

  • This week we received traps from 53 of the 58 fields that we are monitoring; 5 sites are finished for the season.
  • We captured a total of 19 psyllids across 5 fields.
  • Captures were from the following counties: Payette, Canyon, and Twin Falls.
  • One of the psyllids collected last week tested positive for Lso.

Psyllid captures continue to be relatively low overall—slightly lower than last week and similar to the low captures we saw over the last two years at this time. We did find another Lso-positive psyllid last week so—despite the low captures—we are seeing some positives, which may slightly elevate the risk of ZC. A psyllid from a set of sticky traps that arrived late to us could not be tested, so we will have those results by next week. As we get into vine kill, remember that our research with Russet Burbank shows that ZC can develop during storage if infection occurs as late as two weeks before vine kill.