1. Department of Entomology and Plant Pathology, North Carolina State University, Vernon G. James Research and Extension Center, Plymouth, NC
2. Department of Plant and Environmental Sciences, Clemson University, Pee Dee Research and Education Center, Florence, SC
3. Department of Plant and Environmental Sciences, Clemson University, Edisto Research and Education Center, Blackville, SC
4. USDA-ARS, Soybean and Nitrogen Fixation Research, Raleigh, NC