1. Rhinelander Agricultural Research Station Univ. of Wisconsin Rhinelander WI 54501
2. Monsanto Co. St. Louis MO 63167
3. Dep. of Plant, Soil, and Insect Sciences Univ. of Massachusetts Amherst MA 01003
4. Dep. of Horticulture Univ. of Wisconsin 1575 Linden Dr. Madison WI 53706