Leaf scorch may occur on any species of tree or shrub. This foliar symptom indicates that not enough water is reaching the leaves. Leaf scorch is generally not infectious; however, a bacterial infection has been associated with leaf scorch in some trees.
Broadleaf evergreens and needled evergreens are subject to a winter condition similar to leaf scorch. This condition is called winter drying. Rhododendron, magnolia and pine are the Kentucky plants commonly affected.
Kaiser, Cheryl A.; Hartman, John R.; and Witt, Mary L., "Leaf Scorch and Winter Drying of Woody Ornamentals" (1989). Agriculture and Natural Resources Publications. 2.