In 2017, we tested several foliar fungicides on corn at six locations in Iowa: ISU Northwest Research and Demonstration Farm (NWRF), Sutherland; Northeast Research and Demonstration Farm (NERF), Nashua; Northern Research and Demonstration Farm (NRF), Kanawha; Southwest Research and Demonstration Farm (SWRF), Lewis; Southeast Research and Demonstration Farm (SERF), Crawfordsville; and the Ag Engineering and Agronomy (AEA) Farm, Boone. At all locations, the previous crop was soybean. Hybrids varied across locations, and were rated between 3 and 5 for gray leaf spot (GLS) resistance where 9 = most resistant.
Iowa State University
Robertson, Alison and Shriver, John, "Should We be Spraying Fungicides on Corn at V12?" (2018). Integrated Crop Management News. 2463.
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