Pest Management Fact Sheet #5065 Developed by Alicyn Smart, Assistant Extension Professor & Extension Plant Pathologist, Matthew Wallhead, Extension Ornamental Horticulture Specialist and Assistant Professor of Horticulture, University of Maine Cooperative Extension, and Nathan Andrews. For information about UMaine Extension programs and resources, visit extension.umaine.edu. Find more of our publications and books at extension.umaine.edu/publications/.