Trees for Tennessee Landscapes - Maintaining and Protecting
Shade trees and small ornamental trees may be affected by plant diseases. Most are simply aesthetic problems and cause no long-term damage to the tree. Some diseases can seriously disfigure trees, while others are lethal.
"SP546 Diseases of Shade and Ornamental Trees," The University of Tennessee Agricultural Extension Service, SP 546-15M-11-99 R12-4910-17-002-00, http://trace.tennessee.edu/utk_agexfores/65