July is an interesting month for disease scouting. This article discusses some soybean diseases you may see during scouting this month. Rhizoctonia root rot and Phytophthora root rot continue to be problems in some soybean fields.Rhizoctonia damping-off was more prevalent this year than in other years based on samples submitted to the ISU Plant Disease Clinic and reports from field staff. Following application of herbicides for weed control, many samples examined showed root rot resulting from fungi-herbicide interactions. Check ICM articles from spring 2001 issues for management information on these diseases.
Iowa State University
Yang, X. B., "Soybean disease scouting in July" (2001). Integrated Crop Management News. 1853.
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