1. Fisher Delta Research, Extension, and Education Center Univ. of Missouri Portageville MO 63873 USA
2. Crop, Soil, and Environmental Sciences Univ. of Arkansas Fayetteville AR 72701 USA
3. Division of Plant Science and Technology Univ. of Missouri Columbia MO 65211 USA
4. Dep. of Crop and Soil Sciences Univ. of Georgia Athens GA 30602 USA
5. Dep. of Plant Pathology and Institute of Plant Breeding, Genetics and Genomics Univ. of Georgia Athens GA 30602 USA
6. College of Agricultural, Life, and Physical Sciences Southern Illinois Univ. Carbondale IL 62901 USA
7. Dep. of Plant Pathology Univ. of Arkansas Fayetteville AR 72701 USA
8. Crop Genetics Research Unit USDA Agricultural Research Service Stoneville MS 38776 USA