This bulletin was developed by Eleanor Groden, Associate Professor of Entomology; Francis Drummond, Professor of Insect Ecology/Entomology; and Lois Berg Stack, Extension Professor of Ornamental Horticulture. Ant graphic by Carrie Graham. Reviewed and updated by Charles Armstrong, Cranberry Professional & Insect Diagnostician (2025) For information about UMaine Extension programs and resources, visit extension.umaine.edu.Find more of our