1. Department of Entomology and Plant Pathology, The University of Tennessee, 2505 E.J. Chapman Drive, 370 Plant Biotechnology Building, Knoxville, TN 37996-4560, USA
2. Department of Plant Biology, School of Environmental and Biological Sciences, Rutgers University, New Brunswick, NJ 08091-8520, USA
3. US Department of Agriculture, Agricultural Research Service, US Vegetable Laboratory, Charleston, SC 29414, USA