A new potato alert was posted to PNWPestAlert.net for Aug. 3.
"Potato psyllids continue to be found across several sites being monitored by the University of Idaho. Numbers are up considerably at two sites. Sixteen potato psyllids were trapped on yellow sticky cards this week at the Kimberly R&E Center (and two psyllids were collected by vacuum sampling), and 54 potato psyllids were trapped on a grower's field in Twin Falls County. Eight psyllids were trapped on sticky cards in a field in Jerome County, and one was trapped in another field in Twin Falls County. We have yet to find immature potato psyllids on leaf samples taken from potato fields. See the U-Idaho site below to view a table that details where (by county) and when potato psyllids have been found so far during this season in Idaho.
"Thus far, zebra chip in potato plants has been confirmed by PCR (molecular testing) at three locations in Twin Falls County (including the Kimberly R&E Center) and one location in Minidoka County. Plants with ZC symptoms have been collected or reported from other locations, but we are awaiting confirmation with PCR results.
"We continue to encourage vigorous scouting efforts. Refer to the sites below for guidance on scouting and IPM programs (including insecticide recommendations) for potato psyllids."
To view the full alert, and to download any attached files, visit www.pnwpestalert.net.