1. USDA Forest Service Northeastern Forest Experiment Station, 180 Canfield St., Morgantown, WV 26505
2. Division of Plant Sciences West Virginia University, Morgantown WV 26506
3. Department of Foresty, University of Vermont, Burlington, VT 05405
4. USDA-APHIS Otis Methods Development Center, Bldg. 1398, Otis ANGB, MA 02542