1. Department of Horticulture and Crop Science Ohio State University Columbus OH 43210 USA
2. Center for Applied Plant Sciences Ohio State University Columbus OH 43210 USA
3. School of Plant and Environmental Sciences Virginia Tech Blacksburg VA 24061 USA
4. Department of Plant Pathology and Microbiology Iowa State University Ames IA 50011 USA
5. Department of Plant Pathology Ohio State University Wooster OH 44691 USA
6. Center for Soybean Research Ohio State University Wooster OH 44691 USA