Washington State University operates two Plant Pest Diagnostic Clinics, in Puyallup and in Pullman. Services of either clinic are available to clients statewide; however, the Puyallup Clinic
generally handles samples from western Washington, while samples from eastern Washington are usually submitted to the Pullman Clinic
. Both Clinics offer diagnosis of plant diseases and disorders, insect and arthropod identification, and plant/weed identification. Identifications and diagnoses are accompanied by management recommendations when appropriate. Services provided by the WSU diagnosticians are fee-based
. The WSU Clinics are able to process samples from Washington State, and can now accept out-of-state samples from the contiguous US.
For a listing of Clinics in other states, see Other Diagnostics Resources
Digital Diagnostics: Clients with PPDeN accounts may submit information and high-quality photos via the Plant Pest Diagnostic eNetwork (PPDeN). Digital sample submission typically allows a more timely response. Digital samples also guide the diagnostician when instructing the client how to submit a physical sample of the plant problem. Those wishing to use PPDeN must have a user account, which may be applied for on the PPDeN website. A webinar on using PPDeN is available here, or may be accessed through the PPDeN website by account holders.