Lynn Ketchum

Several statewide and regional programs are in place to help with your plant diseases. The OSU Plant Clinic can help you diagnose the problem while the PNW Plant Disease Management Handbook can help with solutions. Several OSU faculty are located throughout the state to also assist with plant problems.

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Plant Disease & Disease Diagnosis

Recognize and name disease symptoms in your plants.

By Cynthia Ocamb, | Presentation

Diagnosing plant problems

Plant problem diagnosis basics

By Neil Bell, | Presentation

Plant Pathology Presentation

Plant disease basics

By Brooke Edmunds, | Presentation


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Ask an Expert is a way for you to get answers from the Oregon State University Extension Service. We have experts in family and health, community development, food and agriculture, coastal issues, forestry, programs for young people, and gardening.

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My pears have rust, what can I do?

Last year crop was a total failure due to this. This year I have gently removed close to 6 small fruit starts. I just found some leaves on the pear with these spores. I have been treating the soil and the tree with neem granules, for soil, and neem oil spray for leaves and branches and fruit....

By Jean R. Natter | Featured Question