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'Bloodgood' Japanese Maple Anthracnose: Wet Spring Disease

Anthracnose on Mature 'Bloodgood' Maple

Yellow-brown spots, wilting, leaf drop in wet springs. Fungicides (mancozeb, chlorothalonil) must start at bud swell. Rake fallen leaves. Usually not fatal unless repeated yearly.

Plant Diseases: Mature Maple Tar Spot: Management and Fertilization; Japanese Maple Chemical Injury from House Washing; Maple Leaf Warts and Holes: Phyllosticta Leaf Spot; Red Bumps on One Maple Only: Insect Galls, Not Disease; Silver Maple Base Sprouts Only: Root Stress and Canopy Loss; Verticillium Wilt Suspected in 'Bloodgood' Japanese Maple with Trunk Fungus; Japanese Maple Leaf Scorch and Transplant Shock: Same Symptoms, Different Causes; Phyllosticta Leaf Spot on Maple: The 'Lunar Eclipse' Fungus; Japanese Maple Cold Damage: Will Leaves Return?; Maple Tree Fall Color: 'Legacy' Sugar Maple or 'Autumn Blaze'

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Red Bumps on Young Maple Leaves: Harmless Leaf Galls

Phyllosticta Leaf Spot on Young Maple

Bloodgood Japanese Maple Flowering vs. Leafing: Patience Needed

Maple Leaf Blister: Cosmetic Concern, Not a Health Threat

Improving Fall Color on Maples in Eastern Oklahoma

Red Maple Leaf Spots vs. Galls: Identify Before Treating