Maple Tree White Spots and Leaf Eaters: Lichen and Insect Control

10-ft maple (3" trunk) transplanted 2 years ago. White patchy spots on bark/branches, leaves being eaten.

White Spots: Lichen

Algae+fungi symbiosis. Epiphytes (air-fed). Indicate thin canopy. Cosmetic. Control: improve vigor → denser shade.

Spray foliage with Orthene (acephate) — kills feeding insects. Available at nurseries.

Trees: Identifying Lichen vs. Disease on Maple Trunks and Managing Frost Cracks; Black Spots on Japanese Maple Bark: Likely Harmless Lichens; Black Spots on Maple Leaves: Tar Spot Fungus—Rake Leaves, Reduce Inoculum, Tree Usually Fine; White Powdery Spots on Maple Leaf Undersides: Likely Insects; Maple Leaf Warts and Holes: Phyllosticta Leaf Spot; White Spots on Red Maple: Superficial Fungus/Algae, Not Harmful; Maple Trunk White Spots: Harmless Lichens; Phyllosticta Leaf Spot on Maple: The 'Lunar Eclipse' Fungus; Phyllosticta Leaf Spot on Young Maple; Minor Leaf Spots on Young Japanese Maple

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