Marginal/interveinal browning in summer heat = bacterial leaf scorch (Xylella). No cure, no spray. Confused with anthracnose (spring, vein-limited). Tree declines over years. Kentucky hit hard. Remove if hazardous.
Chrysanthemum Leaf Scorch: Pesticide Phytotoxicity and Atomic Grow
Oak White Floss on Leaf Undersides: Insect/Spider Silk, Need Photos
Oak Leaf Mulch: Free, Excellent, and Safe for Vegetables
Oak Leaf Blister: Taphrina caerulescens Symptoms and Control
Water Oak Leaf Blister: Cosmetic, Not Fatal
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