Pest Management Fact Sheet #5039 James F. Dill, Pest Management Specialist Clay A. Kirby, Insect Diagnostician For information about UMaine Extension programs and resources, visit extension.umaine.edu. Find more of our publications and books at extension.umaine.edu/publications/. Introduction The mouthparts of sucking insects are specialized for piercing and sucking.  These pests damage plants by inserting their