Management of Soybean Foliar Diseases Which Were Prevalent in Iowa During the 2004 Growing Season
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The Iowa State University Integrated Crop Management Conference is Iowa's premier crop production education event. No other program in Iowa brings together the diverse range of topics, slate of expert presenters and results of the latest University research.
The ICM Conference offers workshops focusing on the latest in crop production technology. Experts from Iowa and surrounding states will provide research updates and results in soil fertility, soil and water management, crop production and pest management.
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Abstract
The 2004 growing season was cool and wet, and therefore favorable for the development of a number of soybean foliar diseases. Many of the diseases occurred together in the same area and often on the same plant. Some diseases showed up early in the season, some later in the season and some were present throughout the season. The diseases which showed up early in, and remained present throughout the growing season were brown spot and bacterial blight. Cercospora leaf blight, frogeye leaf spot and downy mildew started in middle of the season and continued until the end of season. Powdery mildew was reported towards the end of the growing season. Below we discuss these diseases and their management strategies for next year.