1. Department of Entomology; University of Illinois; Urbana IL USA
2. Department of Entomology; Purdue University; West Lafayette IN USA
3. Hermiston Agricultural Research and Extension Center; Oregon State University; Hermiston OR USA
4. Illinois Natural History Survey, Forbes Natural History Building; University of Illinois; Champaign IL USA
5. Department of Crop Sciences; University of Illinois; Urbana IL USA
6. DuPont Agricultural Biotechnology; Experimental Station; Wilmington DE USA