Use of Foliar Applied Fungicides
for Soybean in the North Central U.S.
By Dr. Paul D. Esker
Assistant Professor and Field Crops Extension Plant Pathologist
Department of Plant Pathology
University of Wisconsin-Madison
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The use of foliar fungicides in field crop production, including soybean, has recently been on the increase. The increased interest in foliar fungicides is in part due to the discovery of Asian soybean rust in the U.S. in 2004. As a relatively new tool for soybean growers in the northern soybean production areas, the focus of this presentation will be increasing understanding of what is a fungicide, the role of integrated pest management in the fungicide decision process, the different types of modes of action that are currently available, the role of resistance management, application methods for foliar fungicides, and a discussion of some of the current results from different trials in the North Central region. To date, results from foliar fungicide trials have been variable and research is currently being conducted to determine under which situations the application of a foliar fungicide will be most effective.
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