White Spots on 'King Crimson' Maple: Common Leaf Fungus, Easy Management

Diagnosis

White powdery spots on leaves all summer; other local King Crimson maples same. = Leaf spot fungus. Cosmetic, not a health threat.

Fall: Rake and remove all fallen leaves (reduces spores).
Spring (optional): Spray new leaves with fungicide if early infection bothers you.

Plant Diseases: Black Spots on Maple Leaves: Tar Spot Fungus—Rake Leaves, Reduce Inoculum, Tree Usually Fine; Tulip Tree White Spots and Sticky Leaves: Lichens, Honeydew, and Insect Control; Maple Leaf Underside White Spots: Galls or Aphids; White Spots on Maple Leaves: Cottony Cushion Scale; White Powdery Spots on Maple Leaf Undersides: Likely Insects; White Spots on Red Maple: Superficial Fungus/Algae, Not Harmful; Maple Leaf Spots and Tulip Tree Trunk Holes: Two Separate Issues; Maple Leaf Galls: Insect-Caused Bumps on Autumn Blaze Maple; Powdery Mildew on Crimson King Maple: Identification and Fungicide Options; Replacing a Cement Patio Near a King Crimson Maple: Best Materials and Methods

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