Oregon State University

Pathological Tests

Performed in the Special Testing Unit:

Blackleg Testing: A test that detects the presence of Phoma lingam (Leptoshaeria maculans) on seed. The test is for Brassica species: canola, kale, turnip, cabbage, cauliflower, etc.

Endophyte: A test to detect the presence or absence of endophyte fungi (Neotyphodium spp.) in seeds. It helps growers to make decisions regarding the marketing of grass seeds for feed or turf purposes.

Mosaic Virus Testing: A test that detects the presence mosaic virus on seed. This test is for squash, tomato, pepper, cucumber, potato, and other species of  garden seed.

Performed in the Purity Unit:

Pest and Disease (P&D): The working sample is examined for a list of pests and diseases. Affected seeds are removed, identified, weighed, and reported by percentage.

Orobanche Test (OT): Determines the presence of Orobanche seeds in a submitted sample of red clover using a dry method.


Ergot: A test to detect Ergot (Claviceps purpurea) in a sample. The ergoted seeds are removed, weighed, and reported as percentage.

Contact Info

The OSU Seed Laboratory is an AOSA and ISTA member lab and is ISTA Accredited Laboratory US07.

3291 SW Campus Way
Corvallis, OR 97331
Phone: 541-737-4464
Fax: 541-737-2126

Hours: 8-5 Mon - Fri
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