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Focus on Potato

Early Blight: A Global Management Issue
on Potatoes

April 2011

By Walter R. Stevenson, Ph.D.
Professor Emeritus
University of Wisconsin
Madison, Wisconsin

Watch Presentation (20 min 57 sec)

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This presentation will aid consultants, growers and practitioners understand how to identify and manage early blight of potato in the field and storage. Key symptoms are described that help to differentiate this disease from other common diseases. Important details of the pathogen, host and disease cycle are discussed. Managing early blight in the field requires the careful integration of cultural and chemical methods including rotation, choice of cultivar, plant nutrition and fungicide application. Understanding how these elements play a role in managing early blight helps to reduce losses in yield and tuber quality as well as reducing the reliance on weekly application of fungicides.

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