Northeast Research and Demonstration Farm
Use of fungicides prior to 2004 was not common in soybean production in Iowa and much of the north central region, except for soybean seed production. Use of fungicides to control soybean foliar diseases has been a hot topic. Survey of the literature shows a disagreement among researchers, between university extension recommendations and industry application.
Iowa State University
Yang, Xiao-Bing; Navi, Shrishail S.; Shriver, John M.; and Pecinovsky, Kenneth T., "Effect of Foliar Fungicides on Soybean Yield" (2009). Iowa State Research Farm Progress Reports. 553.