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Every year we evaluate commercial fungicides on corn applied at V5 alone, VT-R1 alone, or both growth stages for disease control and effect on yield. The trial was done in collaboration with the farm managers at four Iowa State University (ISU) Research and Demonstration Farms (Table 1). The trials are laid out in a randomized complete block design with four to six replicates.  Plot sizes are 10 foot (4 rows) wide and 30-100 foot long. Hybrids varied by location.

By Alison Robertson, Department of Plant Pathology and Microbiology

Within the past week several foliar diseases have been reported in Iowa.