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Focus on Potato


White Mold of Potato:
Epidemiology and Management

May 2011




By Dennis Johnson, Ph.D.
Professor and Extension Plant Pathologist
Washington State University
Pullman, Washington
Email: dajohn@cahnrs.wsu.edu


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Summary:

This presentation provides an overview of white mold or Sclerotinia stem rot of potato. It is intended to help growers, consultants, and students understand how white mold can be better managed by modifying the canopy environment and by timing control tactics based on the disease cycle. The presentation shows representative color images of the disease, explains the cause, and defines environmental and plant developmental factors that lead to the development of the disease. White mold management tactics are discussed.


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