1. USDA-ARS Cereal Crops Research Unit, Northern Crop Science Laboratory, Fargo, ND 58102. Mention of trade names or commercial products in this article is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the U.S. Department of Agriculture. USDA is an equal opportunity provider and employer.
2. Corresponding author. Phone: (701) 239-1342. Fax: (701) 239-1369. E-mail: Daryl.Klindworth@ars.usda.gov
3. Department of Plant Sciences, North Dakota State University, Fargo, ND 58108.