Plant Pest Diagnostic Clinic

The Washington State University Plant Pest Diagnostic Clinic is dedicated to serving the state of Washington and its citizens by providing the highest quality service by providing plant disease and disorder diagnosis, pest identification, and management strategies. The Plant Pest Diagnostic Clinic provides plant health problem diagnosis to homeowners; greenhouse and nursery operations; public and private landowners; and commercial growers including those involved with agriculture, horticulture, and floriculture

To submit a sample for DIAGNOSIS, please fill out a submission form and follow the sample guidelines.

 Please Note: Hemp samples MUST be accompanied by a Washington State Hemp Producer’s License

To submit a sample for VIRUS testing, please fill out a Virus Test Submission Form

To submit samples for LITTLE CHERRY VIRUS and WESTERN X, please fill out a Little Cherry Disease Response Diagnostic Request form  

Please Note: We will NOT be accepting samples for Little Cherry or Western X until April 2022. 

Washington State University operates two Plant Pest Diagnostic Clinics, in Puyallup and in Pullman. Services of either clinic are available to clients statewide; samples from eastern Washington are usually submitted to Pullman.