1. USDA-ARS United States Vegetable Laboratory, Charleston, SC 29414;
2. USDA-ARS Mycology and Nematology Genetic Diversity and Biology Laboratory, Beltsville, MD 20705-2350;
3. Edisto Research and Education Center, Department of Plant and Environmental Sciences, Clemson University, Blackville, SC 29817;
4. Department of Plant Industry, Clemson University, Pendleton, SC 29670; and
5. Department of Plant and Environmental Sciences, Clemson University, Clemson, SC 29634