1. Department of Entomology and Plant Pathology, North Carolina State University, Raleigh, NC 27695-7613
2. Department of Plant and Soil Science, Texas Tech University, Lubbock, TX 79409
3. Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC 27695-7620
4. USDA-ARS Plant Science Research Unit, Raleigh, NC 27695