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Soybean Stem Canker: Re-emerging?
August 2015

By Febina Mathew, Ph.D.
Oilseeds Plant Pathologist
Assistant Professor
South Dakota State University
Phone: 605-688-5660


Executive Summary
(8 min 12 sec)

Full Presentation
(14 min 18 sec)


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for PC, Mac, and
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for iPhone


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Summary: “This presentation will help consultants, growers, and other agricultural professionals in the soybean production regions of the United States to scout and identify soybean stem canker. In general, Diaporthe species cause seed decay, stem blight and stem canker, resulting in yield losses. More recently, Diaporthe longicolla, the causal agent of Phomopsis seed decay, is reported to cause stem disease on soybean in the North Central United States. This presentation will specifically cover: symptoms produced by the causal agents of soybean stem canker; and how the two Diaporthe species, D. longicolla and D. caulivora, vary in their aggressiveness. Finally, few available management options are discussed”.

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.

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