1. Department of Horticulture, Pennsylvania State University, University Park, PA 16802
2. Department of Entomology, Pennsylvania State University, University Park, PA 16802
3. Current address: Department of Microbiology, University of Tennessee, Knoxville, TN 37996.
4. Current address: Denholm Seeds, P.O. Box 1381, Lompoc, CA 93436