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Oomycete Diseases of Soybean
and Current Management

USDA-NIFA Outreach Webcast

December 2013



By Jim Kurle, Ph.D.
Associate Professor
Department of Plant Pathology
University of Minnesota
Phone: 612-625-3167
Email: kurle001@umn.edu


Watch Presentation (17 min 53 sec)

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Summary: The complex of pathogens that causes seed, seedling, and root rots and damping off of seedlings is the most important cause of poor soybean plant stands and can significantly reduce soybean yields. The most important of these pathogens are the oomycetes, Phytophthora sojae and various Pythium species, often called “water molds” that are most aggressive when soils are saturated or wet for prolonged periods of time. This presentation discusses the biology of these two groups of pathogens, environmental factors that influence disease development, and unique characteristics of Phytophthora sojae and of the Pythium spp. that influence their persistence and aggressiveness as pathogens and our ability to manage oomycete caused diseases. Management of diseases caused by the oomycetes will be discussed with an emphasis on integration of resistance, chemical controls, and cultural practices.


Responsibility: United Soybean Board (USB) farmer-leaders develop and maintain partnerships with U.S. land grant universities and U.S. ag-focused research organizations such as the Plant Management Network to increase the transfer of checkoff-funded applied and practical production research information to U.S. soybean farmers. USB neither recommends nor discourages the implementation of any advice contained herein, and is not liable for the use or misuse of the information provided.

All presentations published on The Plant Management Network reflect individual views of the author/presenter(s) and are not an official position of The Plant Management Network or the author/presenter(s)' affiliated institutions, companies, or organizations. No endorsement of products or companies, institutions, or organizations is intended, nor is criticism implied of those not mentioned. Individuals using agricultural products or any products referenced by The Plant Management Network or its partners, sponsors, or advertisers, should ensure that the intended use complies with current regulations and laws, as well as conforms to the product label.





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