Why does your Acer palmatum have sticky leaves? Diagnose the cause and fix it with our step-by-step guide.
Pet FriendlySmall, soft-bodied insects congregate on the undersides of new growth, excreting 'honeydew,' a sticky, sugar-rich substance. This is the most common cause of sticky residue on Japanese Maple foliage.
Scale insects attach themselves to stems and leaf veins, sucking sap and producing honeydew. Unlike aphids, these pests often look like small, stationary bumps or bumps on the bark/leaves.
This is a secondary fungal growth that feeds on the honeydew left behind by insects. While it doesn't kill the tree directly, the black coating can block sunlight and inhibit photosynthesis.
These insects feed on the sap of Acer palmatum and produce significant amounts of honeydew. They are often found near tender new shoots during late spring and summer.
Your plant might also be experiencing one of these issues:
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