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Washington State University
WSU Puyallup Ornamental Plant Pathology

Plant Disease Research Programs

The Ornamental Plant Pathology program provides research and extension services for many plant diseases, with special emphasis on diseases caused by Phytophthora species.

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Sudden Oak Death
& Ramorum Blight

Symptomatic potted plants

Pacific Madrone

Pacific Madrone

Dutch Elm Disease
National Elm Trial

Puyallup National Elm Trial