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Potato


Integrated Late Blight Management

May 2016




By Amanda Gevens, Ph.D.
Associate Professor
Extension Plant Pathologist
Dept. of Plant Pathology
University of Wisconsin-Madison
Phone: 608-890-3072
Email: gevens@wisc.edu


Watch Presentation (37 min 12 sec)

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Summary: Late blight is a potentially destructive disease of potato and tomato crops worldwide. While the disease has been studied by many for over a century, changes within the Phytophthora infestans pathogen population have required further in depth investigation for management. From 2009 to the current, a group of newly identified genotypes/clonal lineages/strains of the pathogen were identified, with US-23 becoming most predominant in both tomato and potato production areas of the continental U.S. This presentation will offer new information on the characterization of US-23 and other newer clonal lineages as it pertains to pathogen persistence and management. Further, a process for integrated late blight management, established for Wisconsin, will be shared to aid practitioners in understanding critical concepts of the pathogen and fungicides to enhance overall disease management.





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