Integrated Crop Management News

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In the past 2 years, soybean top dieback, also called tip blight by growers, has emerged as a disease concern to some growers. The disease was initially reported in Ohio 20 years ago and was first noticed in Iowa in 1997. Foliar symptoms of this disease occur during the reproductive stage of soybean plants in August, but the fungi associated with the disease can cause damage during the seedling stage. In the 1998 growing season, we received reports and questions from producers on the occurrence of black lesions on cotyledons. In this article we provide information on seedling disease caused by the same fungi that caused these lesions.

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Iowa State University



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