Acer truncatum Sticky Leaves - Causes & Fixes

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Aphid Infestation

Aphids are sap-sucking insects that pierce the tender new growth of Acer truncatum to feed. As they consume nutrients, they excrete a sugary, sticky substance known as honeydew onto the leaf surfaces.

Very Common

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How to confirm: Inspect the undersides of new leaves and stem junctions for tiny, soft-bodied 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.

Bonide Captain Jack's Neem Oil 32 oz

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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.

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

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Scale Insects

Scale insects attach themselves to the twigs and leaf petioles of the Bunge Maple, extracting sap. Like aphids, they produce honeydew as a byproduct of their feeding process.

Very Common

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How to confirm: Look for small, stationary, bump-like structures firmly attached to the stems or leaf bases.

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

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Wipe the sticky honeydew residue off the leaves with a soft cloth and water to prevent the growth of sooty mold.

3 Inspect the undersides of leaves and crevices in the bark for any remaining insect clusters to prevent re-infestation.

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Sooty Mold Development

While not the primary cause of stickiness, sooty mold is a black fungus that grows on the honeydew left by insects. It can coat the leaves of Acer truncatum, making them appear dark and grimy.

Common

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How to confirm: Check if there is a black, powdery coating on the leaves that can be wiped off with a damp cloth.

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1 Identify and treat the underlying insect pest (such as aphids or scale) that is producing the sticky honeydew by applying an organic insecticide.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Gently wash the leaves with a soft cloth or a gentle stream of water to remove the black sooty mold residue and restore photosynthesis.

Flora Premium Plant Mister

Spray Bottles

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

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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Treehoppers

Treehoppers feed on the vascular fluids of maple species and are prolific producers of honeydew. Their presence often results in highly sticky leaf surfaces during the growing season.

Common

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How to confirm: Gently tap the leaves to see if small, jumping insects fall from the foliage.

build How to fix it

shopping_cart Recommended Products

1 Inspect the undersides of leaves and stems for small, insect-like treehoppers and spray the plant with an organic insecticide to eliminate the pests.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Wash the sticky honeydew residue off the leaves using a gentle stream of water or a soft cloth to prevent the growth of sooty mold.