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The C. Wayne Ellett Plant and Pest Diagnostic Clinic at Ohio State University specializes in the identification of plant diseases, plant health problems, insects and insect related problems.  The CWEPPDC offers a broad spectrum of testing to idenfiy pests and plant diseases.  Diagnosticians collaborate with specialists in plant pathology, entomology, horticulture, agronomy, natural resources, and other areas to identify pests, plant diseases, and cultural and environmental problems of plants.

Please select a category on the left-hand side of the screen that best fits your sample type for detailed sampling instructions.