A new potato alert was posted to PNWPestAlert.net.
Potato psyllids continue to be found on yellow sticky cards across several sites being monitored by the University of Idaho. Two sites (one in Twin Falls County and one in Jerome County) continue to show high numbers relative to other sites and to earlier weeks. Numbers are also up slightly at the Kimberly R&E Center. Nymphs were found in larger numbers this week, particular at the site in Gooding County. Eggs also were found in larger numbers this week: 33, 2, 22 and 35 eggs were found among each of the 100 leaf samples taken from sites 1, 2, 3 and 4, respectively.
No potato psyllids were found this week in the UI sampling network in western or eastern Idaho. A portion of the psyllids collected in previous weeks continues to test positive for liberibacter, the causal agent of ZC. See the link below to view a table that details where (by county) and when potato psyllids and liberibacter have been found so far during this season in Idaho.
Vine kill will occur soon on most fields in the Magic Valley, so sampling will continue for no more than one to two weeks for most sites.
Refer to the sites below for guidance on scouting and IPM programs for potato psyllids and to view trap captures in Idaho so far over the season.
To view the full alert, and to download any attached files, please go to www.pnwpestalert.net.