Citrus Sticky Leaves - Causes & Fixes

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Aphid Infestation

Aphids are sap-sucking insects that inject excess sugars into the plant tissue, resulting in 'honeydew,' a sticky substance on leaf surfaces. This often leads to the development of black sooty mold.

Very Common

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How to confirm: Inspect the undersides of new leaves and tender shoots for tiny, soft-bodied green or black insects.

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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 Wash the sticky residue and any visible sooty mold off the leaves using a gentle stream of water or a soft cloth.

3 Monitor the plant regularly with a spray to ensure no new pests have emerged.

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Scale Insects

Scale insects attach themselves to citrus stems and leaves, extracting nutrients and excreting sticky honeydew. Unlike aphids, these pests appear as small, stationary bumps or shells on the plant.

Very Common

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How to confirm: Look for small, hard, waxy bumps on the twigs or leaf petioles that do not move when disturbed.

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shopping_cart Recommended Products

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

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

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

3 Wipe the sticky honeydew residue off the leaves with a damp cloth to prevent the growth of sooty mold.

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Whitefly Infestation

Whiteflies congregate on the undersides of citrus leaves and excrete honeydew, causing a sticky residue and potential leaf yellowing. A cloud of tiny white insects may emerge when the foliage is disturbed.

Common

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How to confirm: Gently shake a branch over a white surface to see if a cloud of small white moths takes flight.

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shopping_cart Recommended Products

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

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Place yellow sticky traps around the citrus tree to capture adult whiteflies and monitor the infestation level.

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3 Wipe the undersides of the leaves with a damp cloth to remove the existing sticky residue and prevent fungal growth.

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Sooty Mold (Secondary Symptom)

While not the primary cause of stickiness, sooty mold is a fungus that grows on the honeydew left by other pests. It creates a dark, crusty coating that can interfere with the citrus tree's photosynthesis.

Common

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How to confirm: Check if the sticky residue is accompanied by a black, powdery film that can be scraped off the leaf surface.

build How to fix it

shopping_cart Recommended Products

1 Identify and treat the underlying pests (such as aphids, scale, or whiteflies) that are producing the sticky honeydew by applying an organic insecticide spray.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Gently wash the dark, crusty sooty mold off the leaves using a soft cloth or a gentle stream of water to restore the tree's ability to photosynthesize.

3 Apply a specialized fertilizer to help the tree recover from the stress of the infestation and mold coverage.