1. Dep. of Plant SciencesNorth Dakota State Univ.P.O. Box 6050FargoND58108‐6050
2. USDA‐ARS ‐ Cereal Disease Laboratory, 1551 Lindig St., Univ. of MinnesotaSt. PaulMinnesota55108
3. Dep. of Food Sciences & NutritionKing Saud Univ.P.O. Box 2460Riyadh11451Saudi Arabia
4. North Dakota State Univ. Carrington Research Extension CenterP.O. Box 219CarringtonND58421