By Alicyn Smart, D.P.M., Plant Pathologist & Director of the Plant Disease Diagnostic Laboratory, Katherine Garland, Horticulturist, University of Maine Cooperative Extension, and Katie Ashley, University of Maine Graduate Student For information about UMaine Extension programs and resources, visit extension.umaine.edu.Find more of our publications and books at extension.umaine.edu/publications/. With all the time and effort you put