College of Agricultural, Human, and Natural Resource Sciences

Department of Plant Pathology

Hours and Location


Daily 8 AM to 4:30 PM; closed on University Holidays.
Please call ahead if you need to visit at a different time, or to ensure a meeting with the diagnostician.

(509) 335-3292 •

To visit the clinic:

The Plant Pest Diagnostic Clinic is located in 316 Johnson Hall on the WSU campus in Pullman.  Johnson Hall is the building attached to Vogel and just to the east of it.

Permits are required for parking in visitor spaces and may be purchased for $5-6 at the Visitor Center.  Visitor and metered parking spaces are available on the streets north and south of Johnson Hall.  An hourly parking garage is located near the Compton Union Building (CUB).


Ship samples to:

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

Please DO NOT mail on a Friday or before any national holiday as the specimens may deteriorate over the weekend.

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