1. USDA, Agricultural Research Service, Corn Insects and Crop Genetics Research Unit, 2333 Pammel Drive, Iowa State University, Ames,IA 50011. Ph. 515-294-8614.
2. Department of Agronomy, Iowa State University, Ames, IA 50011. Ph. 515-294-2756
3. USDA, Agricultural Research Service, Corn Host Plant Resistance Research Unit, 32 Creelman St., Mississippi State, MS 39762. Ph. 662-325-2733.