Acer capillipes Sticky Leaves - Causes & Fixes

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Aphid Infestation

Aphids are small, soft-bodied insects that pierce the tender new growth of Lacebark Maples to suck sap, excreting a sugary substance known as honeydew. This residue creates a noticeable sticky film on the leaf surfaces.

Very Common

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How to confirm: Inspect the undersides of young leaves and terminal buds for tiny, pear-shaped insects or clusters of eggs.

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1 Apply an organic insecticide to eliminate the aphid population and stop the production of honeydew.

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2 Gently wash the sticky residue off the leaves using a soft cloth or a controlled stream of water to prevent fungal growth.

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3 Inspect the undersides of new growth regularly to catch any remaining pests before they spread.

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Scale Insects

Scale insects attach themselves to the stems and leaf petioles of Acer capillipes, feeding on phloem sap. Like aphids, they excrete honeydew which coats the foliage in a sticky residue.

Very Common

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How to confirm: Look for small, stationary bumps or 'shells' firmly attached to the twigs and leaf stalks.

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1 Apply an organic insecticide spray to the plant to kill existing scale insects and their eggs.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

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2 Physically remove visible scale insects from stems and petioles using a soft cloth or cotton swab dipped in rubbing alcohol.

3 Wash the foliage with a gentle stream of water to remove the sticky honeydew residue and prevent fungal growth.

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Sooty Mold Development

While not a direct cause of stickiness, sooty mold is a fungus that grows on the honeydew left by sap-sucking insects. It creates a black, velvety coating that can follow the sticky residue.

Common

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How to confirm: Check if the sticky residue is accompanied by a dark, soot-like black film spreading across the leaf surface.

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1 Identify and treat the underlying sap-sucking insects (such as aphids, scale, or whiteflies) that are producing the sticky honeydew.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

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2 Gently wash the black sooty mold off the leaves using a soft cloth or a gentle spray of water to restore photosynthesis.

3 Monitor soil moisture levels to ensure the tree is not under environmental stress, which can make it more susceptible to pest infestations.

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Whitefly Infestation

Small, winged whiteflies can colonize the underside of Lacebark Maple leaves, feeding on sap and leaving behind honeydew. This is often accompanied by a fine white dust-like appearance on the foliage.

Common

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How to confirm: Gently shake a branch to see if tiny white insects take flight from the underside of the leaves.

build How to fix it

shopping_cart Recommended Products

1 Apply an organic insecticide spray to the undersides of the leaves to eliminate adult whiteflies and larvae.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Deploy yellow sticky traps near the foliage to capture flying adults and monitor the infestation level.