By Lois Berg Stack,1 Alison C. Dibble,2 and Francis A. Drummond3 1Professor Emerita, Cooperative Extension and School of Food and Agriculture, University of Maine2Research Scientist (Retired), School of Biology and Ecology, University of Maine3Professor Emeritus, School of Biology and Ecology and Cooperative Extension, University of Maine All photos courtesy of A.C. Dibble For information about