Pest Management Fact Sheet #5060 Developed byDeveloped by Alicyn Smart, Assistant Extension Professor & Extension Plant Pathologist, 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/. Other Name: Oedema Pathogen: Abiotic Disease Introduction Edema is a physiological disease that effects leaves, stems, and