1. Kansas State University, Biological and Agricultural Engineering Department Manhattan, KS.
2. USDA-ARS CGAHR, Hard Winter Wheat Genetics Research Unit, Manhattan, KS.
3. University of Minnesota, Department of Plant Pathology, St. Paul, MN.
4. USDA ARS CGAHR, EWERU, Manhattan, KS.
5. SDSU, Plant Science, Brookings, SD.
6. Corresponding author. E-mail: Floyd.Dowell@ars.usda.gov