1. Dep. of Plant Sciences North Dakota State Univ. NDSU Dep. 7670, P.O. Box 6050 Fargo ND 58108‐6050 USA
2. Dep. of Horticultural Sciences Univ. of Minnesota 305 Alderman Hall St. Paul MN 55108 USA
3. NDSU North Central Research Extension Center 5400 US‐83 Minot ND 58701 USA
4. Dep. of Plant Pathology Syngenta Stanton MN 55018 USA
5. NDSU Carrington Research Extension Center 663 Hwy. 281 N. PO Box 219 Carrington ND 58421‐0219 USA
6. NDSU Hettinger Research Extension Center 102 Hwy 12 W, PO Box 1377 Hettinger ND 58639 USA
7. NDSU Williston Research Extension Center 14120 Highway 2 Williston ND 58801 USA
8. Langdon Research Extension Center 9280 107th Ave. N.E. Langdon ND 58249 USA
9. Dickinson Research Extension Center 1041 State Ave. Dickinson ND 58601 USA
10. Dep. of Plant Pathology North Dakota State Univ. NDSU Dep. 7660, P.O. Box 6050 Fargo ND 58108‐6050 USA
11. Eastern Agricultural Research Center Montana State Univ. 1501 N Central Ave Sidney Montana 59270 USA
12. Dep. of Plant Science and Plant Pathology Montana State Univ. 119 Plant BioScience Building Bozeman MT 59717‐3150 USA