 |
BROWN LEAF SPOTS AND CURLING (Occurs frequently) Brown necrotic spots occurring on the lower leaves, as well as curling of the leaf margins. Photo by Chad J. Behrendt |
 |
ORANGE LEAF SPOTS (Occurs occasionally) Orange to rust colored lesions appear on the leaf, petiole, and/or stem. Photo by Chad Behrendt |
 |
TREE DECLINE (WITH WITCHES BROOM ON TRUNK) (Occurs occasionally) Tree decline with loss of dominance and witches brooming near the base of the main trunk. Photo by Cornell University, Department of Plant Pathology |
 |
WILTING/DROUGHT-LIKE SYMPTOMS (Occurs infrequently) Wilting or browning of leaves on individual branches in the crown. Photo by Robert Blanchette |
 |
OTHER CAUSES Other symptoms caused by chemical, animal, or environmental factors. Photo by Chad Behrendt |