1. Department of Entomology, Purdue University, West Lafayette, Indiana 47907-2089;
2. USDA-ARS and Department of Entomology, Kansas State University, Manhattan, Kansas 66506;
3. USDA-ARS and Department of Entomology, Purdue University, West Lafayette, Indiana 47909-2089;
4. Department of Entomology, North Dakota State University, Fargo, North Dakota 58105;