Psyllid captures climb; two psyllids from last week Lso positive

• This week we received traps from 38 of the 55 fields that we are monitoring; many fields have now undergone vine kill.
• We captured a total of 281 psyllids spread across 23 fields.
• Captures were from the following counties: Canyon, Owyhee, Elmore, Jerome, Twin Falls, Cassia, and Minidoka.
• Of the 116 psyllids captured last week, two of them from Canyon County tested positive for Lso.
• For psyllids captured this week, we expect to have results on Lso incidence next week.

Overall psyllid captures continue to be relatively high, and captures per trap were notably higher this week than for the same time during the previous several seasons. Thankfully, Lso incidence has been relatively low for the most part, though there have been some positives over the last two weeks in Canyon County. The increased abundance of psyllids this week is also somewhat localized, with most psyllids captured in Canyon, Elmore, and Twin Falls counties. We urge growers to keep their IPM programs going, especially for areas that might be at slightly higher risk. In our research with Russet Burbank, tubers still have some risk of showing ZC symptoms in storage if infection occurs within 1-2 weeks before vine kill.

More information on management of potato psyllids and ZC can be found here:
https://www.uidaho.edu/extension/food/ipm/ag-pests/psyllids

To view the weekly data by site in the old spreadsheet format: https://tinyurl.com/potatopsyllid