1. USDA-ARS, Corn Insects and Crop Genetics Research Unit , Ames, IA 50011 , USA
2. Department of Plant Pathology and Microbiology, Iowa State University , Ames, IA 50011 , USA
3. Division of Animal Sciences, University of Missouri , Columbia, MO 65211 , USA
4. Department of Computer Science, Iowa State University , Ames, IA 50011 , USA