College of Agricultural, Human, and Natural Resource Sciences

Department of Plant Pathology

WSU 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.

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.

Please Note: We cannot accept cannabis samples due to WSU compliance with Federal policy.

Rachel Bomberger, M.S.
Plant Diagnostician

(509)335-3292 • Fax: (509)335-9581 •

Clinic USPS mailing address:
Plant Pest Diagnostic Clinic
Department of Plant Pathology
P.O. Box 646430
Pullman, WA  99164-6430
Clinic UPS and FedEx address:
Plant Pest Diagnostic Clinic
345 Johnson Hall
100 Dairy Road
Pullman, WA  99164


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Department of Plant Pathology, PO Box 646430, Washington State University, Pullman WA 99164-6430, 509-335-9541, Contact Us
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