1a. Objectives (from AD-416):
Develop new monitoring tool for potato psyllid.
1b. Approach (from AD-416):
Identify and test possible attractants for potato psyllid. Compare attractants to standard monitoring tools under field conditions.
3. Progress Report:
The work summarized in this progress report relates to objective number 2 in the Project Plan for 018-00D: 2. Develop monitoring methods and techniques that reduce grower risk from wireworms that improve predictability of threats to potatoes; and objective number 1 in the Project Plan for 020-00D: 1. Develop monitoring methods for integrated pest management of potato insect pests. Objectives of this project were to develop an efficient monitoring tool for potato psyllid which can be used to replace or complement currently available tools. Several target chemicals extracted from the cuticles of female psyllids and potentially involved in sex attraction were tested in laboratory assays and in field trials. One compound showed significant biological activity in laboratory trials, and modest attractiveness in one field trial. Additional laboratory trials suggest that different populations of potato psyllid may differ in response to targeted compounds, and that chemicals extracted from psyllids of one population may be attractive to males of that genetic population but not to psyllids from other geographic regions. Studies are ongoing to identify other chemicals involved in attraction, with objectives to improve effectiveness of the original targeted compound under field conditions and to determine how geographic origin of the psyllid affects response to attractants. Assays were done in cooperation with scientists in Texas and a pheromone chemist in California. The end objective of having an efficient monitoring tool for potato psyllid was not fully met due to unexpected results showing that different populations of the psyllid respond unequally to our targeted compounds.