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Plant Pest Diagnostic Clinic

Clinic Temporarily Closed April 14 – June 3

The WSU Pullman Plant Pest Diagnostic Clinic will be temporarily closed April 22nd until the beginning of June and will have no access to email during this time frame.

If you need diagnostic assistance the following laboratories are available:

Washington State University- Puyallup
*Washington samples only

Oregon State University- Corvallis

Oregon State University- Hermiston

University of Idaho- Parma
*Idaho samples only as of April. Laboratory may be allowed to accept out-of-state samples soon. Contact Dr. James Woodhall prior to sample submission.

Thank you for your understanding and patience!

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 (pdf) and follow the sample guidelines.

**If you are looking to submit a sample to confirm Fire Blight for FSA purposes only please use this Fire Blight Pathology Diagnostics Submission (2018.07)**

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.

To send a sample from a state other than Washington, please contact the clinic prior to submission.

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


Rachel Bomberger, M.S.
Plant Diagnostician

(509) 335-3292

There are no upcoming events at this time.

Shipping Information

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