During the latest U of M Extension Strategic Farming webinar, University of Minnesota Extension Plant Pathologist Dr. Dean Malvick said charcoal rot could become a bigger issue. Hotter, drier summers make the disease worse. Charcoal rot can impact more than just soybeans and is easily identifiable. “Unfortunately, this has a very wide host range,” said Malvick. The pathogen can infect corn, alfalfa, sunflower and dry edible beans among others. “Symptoms usually begin in the driest parts of the field, premature, yellowing of leaves.” Using a crop rotation with small grains, and selecting varieties with partial resistance can help mitigate charcoal rot pressure.
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