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Details matter when evaluating plant problems

When the cause of a plant ailment isn't obvious, a bit of detective work is in order. That involves many small observations that together create a web of information that leads to the identity of the ailment.

Nicole Sanchez | Apr 2019 | Article

Monitoring diseases in the field

Diseases can reduce the yield and nutritional quality of crops. Vectors are organisms that transmit pathogens that cause diseases and can also threaten crops. Some important vectors of plant pathogens in the Pacific Northwest ...

Silvia I. Rondon, Mary Corp, Stephen M. Van Vleet, Stuart Reitz, Pamela Hutchinson | Jul 2015 | Video Peer reviewed (Gray level)

Asparagus wilt?

Q: We have had a wonderful patch of Jersey Giant asparagus for the past twenty five years. This year, we have something "infecting" a few of the clumps of our asparagus and we can't identify it. It appears to be some kind of wilt or virus?

A: View answer | View all featured questions

Do my laurels have shothole?

Q: We have some large laurels with holes and discoloration on the leaves and wondering what is causing it and how to treat it. We don't see anything on the bottom side of leaves. We'd appreciate your opinion and advice.

A: View answer | View all featured questions

Plants Causing Liver Disease & Sunlight Sensitivity in Pastures

Plants causing liver disease and photosensitization (sensitivity to sunlight) are often grouped together, as photosensitivity is often a secondary symptom of liver disease cause by poisonous plants.

Mylen Bohle, David Hannaway, Andy Hulting, Karin Neff | Apr 2018 | Educational gallery

Bacterial canker infection and control

PowerPoint presentation by Bob Spotts and Kelly Wallis on the infection and control of Bacterial canker.

Lynn Long | Mar 2010 | Presentation