1. Univ. of Minnesota Ext. Service 219 West Cavour Ave. Fergus Fall MN 56537
2. Dep. Plant Sciences and Plant Pathology, P.O. Box 173140 Montana State Univ. Bozeman MT 59717‐3140
3. Northern Agric. Res. Center Star Route 36, Box 43 Havre MT 59501
4. Central Agric. Res. Center HC90‐Box 20 Moccasin MT 59462