Several potato psyllids collected last week tested positive for Lso (liberibacter), the bacterium that causes zebra chip. Lso-positive psyllids were found in the following counties: Payette (1 field), Canyon (7 fields), and Ada (1 field). This is fewer than the previous two weeks, but 48 of the 101 fields (48%) that were sampled last week came up with psyllids.
An alert from the Pacific Northwest PestAlert Network said “Because of the recent prevalence of Lso and the relatively high numbers of potato psyllids that we have been collecting each week, we urge growers to maintain their IPM programs targeting psyllids and to be on the lookout for plants exhibiting ZC symptoms over the coming weeks.”
Read the full alert here:
http://pnwpestalert.net/alerts/index/august-5-2016-positive-psyllids-in-payette-canyon-and-ada-counties
