Project Number: 2092-22000-021-37-R
Project Type: Reimbursable Cooperative Agreement
Start Date: Oct 1, 2018
End Date: Sep 29, 2021
Objective 1. Test the hypothesis that matrimony vine is a primary weed source of potato psyllids arriving in potato fields. Objective 2. Assess whether perennial host plants other than matrimony vine in some regions might also serve as sources of potato psyllids entering potato fields, and determine whether the psyllids arriving from those plants are carrying the zebra chip pathogen. Objective 3. Develop models for each region that can be used to predict psyllid pressure in potato based upon early-season (pre-potato) numbers of psyllids on perennial hosts. Objective 4. Disseminate information on plant identification, plant monitoring, and predictive models to growers and stakeholders.
Psyllids will be collected from traps deployed in Washington, Oregon, and Idaho potato fields in early summer. Gut content analysis will be used to examine the dietary history of the psyllids and determine on what weed hosts the psyllids developed. Data will be used to directly identify the weed sources of potato psyllids colonizing potato fields in the Pacific Northwest.