1. Department of Botany and Plant Pathology, Central Oregon Agricultural Research Center, Oregon State University, Madras
2. National Forage Seed Production Research Center, United States Department of Agriculture–Agricultural Research Service, Corvallis, OR
3. Department of Botany and Plant Pathology, Hermiston Agricultural Research and Extension Center, Oregon State University, Hermiston
4. Union County Extension Service, Oregon State University, La Grande