Sticky Maple Leaves: Aphid Honeydew and Pruning Timing

Cause

Sticky leaves = aphid honeydew. Systemic soil treatment (imidacloprid) is best.

Foliar sprays: acephate (Orthene) preferred (some systemic action). Cover both leaf sides; repeat in 10–14 days.

Prune in winter after leaf fall to avoid sap bleeding.

Trees: Raspberry Decline Unrelated to Maple Leaf Mold; More Details Needed; Maple Dripping Sap on Car: Aphid Honeydew + Wetwood Combo; Maple Anthracnose: Black Leaves and Summer Defoliation; Maple Dripping Sap: Aphids or Scale and Systemic Fix; Maple Tree Dripping Sticky Sap? It's Likely Slime Flux, Not Aphids; Maple Leaf Spot: Phyllosticta—Mostly Cosmetic; Aphid Honeydew Causing Maple Sap Nuisance; Japanese Maple Cold Damage: Will Leaves Return?; Crimson Maple Leaf Scorch After Frost and Drought in Nova Scotia; Maple Sap Flow After Spring Pruning: Normal and Manageable

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