A professional forester or arborist should be consulted when undertaking many of the suggested corrective actions. When in doubt about how much risk a defective tree poses, or how to best treat it, consult a forester or arborist. You may wish to contact your local Cooperative Extension Ofﬁce for educational assistance and to inquire if a listing of qualiﬁed consulting foresters or arborists is available for your area. Otherwise, consult your phone book under Arborists or Tree Service.
Remember that trees do not live forever. Design and follow a backyard landscape plan that includes proper tree selection and a cycle of tree maintenance and replacement.