
Sudarsana Poojari
Director of the Clean Plant Center Northwest at Washington State University (IAREC, Prosser, WA), a plant pathologist/virologist protecting grapevines, hops, and tree fruit via clean plant programs.
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Sep 15, 2026
Clean Plant Center Northwest: Protecting Fruit Trees, Grapes, and Hops
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Erin HooverHOST
Can you describe the journey of plant material from the time that it arrives at CPCNW to the time that you are releasing it as clean material?

Sudarsana PoojariGUEST
Um, it's actually pretty, um, satisfying to walk through the, the process.

Sudarsana PoojariGUEST
So the first one is, uh, diagnosis, and the second one is treating, and then we verify.

Sudarsana PoojariGUEST
That means we retest again before we, uh, either maintain in our repository or release it back to the, um, the nurseries or, uh, custom propagators.

Sudarsana PoojariGUEST
When the material first arrives into the CPCNW, um, it may be a new grape variety or a cherry variety that, uh, a breeder just developed and wants to, uh, get introduced, um, or like a hop cultivator, uh, coming from maybe another state or another country.
22 MINS LATER

Erin HooverHOST
So what kind of challenges or opportunities do you see for clean plant programs in the coming future?