An estimated three million acres of corn in Iowa were sprayed mid-season with fungicides (strobilurin or a strobilurin/triazole combination) in 2007. Reasons for spraying vary and include the high price of corn, potential to control diseases, and a possibility of improved yield from "plant health" benefits. Until this year, fungicide applications to production corn fields were rarely practiced in Iowa because they were not profitable. In addition, many of the hybrids grown today have good overall tolerance to foliar diseases.
Iowa State University
Robertson, Alison E.; Abendroth, Lori; and Elmore, Roger W., "Yield responsiveness of corn to foliar fungicide application in Iowa" (2007). Integrated Crop Management News. 989.
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