Two adult potato psyllids were found on yellow sticky cards that were collected June 19 from a Twin Falls County potato field, according to an alert issued Tuesday by University of Idaho Extension staff.
The psyllids can spread zebra chip, a crop disease that hurts potato yields and leaves bands in tuber flesh that darken when fried.
The insects - which were the first psyllids found in an Idaho field this year - are now being tested to determine if they harbor the Liberibacter bacteria that causes zebra chip.
