The WSU Pullman Plant Diagnostic Clinic is closed as of December 1, 2025. For alternative diagnostic support, please contact your local WSU Extension specialist, Master Gardener Coordinator, or other diagnostic resources, such as:
- WSU Puyallup Plant & Insect Diagnostic Lab – Jenny Glass (jennyglass@wsu.edu,253-445-4582)
- Oregon State University Hermiston Plant Disease Clinic – Dr. Ken Frost or Cassandra Funke (cassandra.funke@oregonstate.edu, 541-567-8321 ext. 120 or (Kenneth.Frost@oregonstate.edu)
- University of Idaho Parma REC Diagnostic Lab – Dr. James Woodhall (jwoodhall@uidaho.edu)
- Richard Old, Weed Identification (rold@pullman.com)
If you need further assistance, please contact Melissa Bills, Administrative Manager for the WSU Department of Plant Pathology (melissa.bills@wsu.edu, 509-335-4852) or Dr. Lindsey du Toit, Chair of the Department of Plant Pathology (dutoit@wsu.edu, 360-848-6140).
Links to Other Resources
- Vegetable Resources (Pacific Northwest Vegetable Extension Group)
- WSU Puyallup Clinic
- Oregon State University Corvallis Clinic
- Oregon State University Hermiston Clinic
- University of Idaho Plant Diagnostic Services
- Analytical Laboratories and Consultants Serving Agriculture in the Pacific Northwest (i.e. labs that test for various agents affecting plants)
- An extensive list of diagnostic labs and other testing resources courtesy of the Pacific Northwest Vegetable Extension Group.