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Leaf
Circular Black Patches
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Insect
Disease
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Herbicide Damage
Improper Pruning
Leaf Scorch
Leaf Spots (Maple-Sycamore)
(Rhytisma acerinum)
Leaf Spots (Oak)
(Tubakia quercina)
Lecanium Scale
(Coccus hesperidium)
Solitary Oak Leafminer
(Cameraria hamadyadella)
Underwatering