Citrus sinensis Sticky Leaves - Causes & Fixes

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Aphid Infestation

Aphids feed on the sap of young orange shoots, excreting a sugary substance known as honeydew which creates a sticky coating on the leaves. This often leads to secondary issues like sooty mold growth.

Very Common

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How to confirm: Inspect the undersides of new leaves and tender stems for tiny, soft-bodied 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 Gently wipe the sticky residue and any visible sooty mold from the leaves using a soft cloth and water to restore photosynthesis.

3 Monitor the tree regularly with a spray to ensure pests do not return to the new growth.

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Scale Insects

Scale insects attach themselves to citrus branches and leaves, sucking nutrients and secreting honeydew. Unlike aphids, these pests often appear as small, immobile bumps or scales on the bark or leaf surfaces.

Very Common

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How to confirm: Look for stationary, raised bumps on stems and check if the sticky residue is accompanied by dark crusty patches.

build How to fix it

shopping_cart Recommended Products

1 Apply an organic insecticide spray to the tree to eliminate the scale insects and stop the secretion of honeydew.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

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

3 Wipe the sticky residue from the leaves to prevent the growth of sooty mold and allow the tree to photosynthesize effectively.

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Whitefly Infestation

Whiteflies congregate on the undersides of citrus leaves, feeding on sap and leaving behind a significant amount of sticky honeydew. 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 light-colored surface to see if small white flies flutter upward.

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shopping_cart Recommended Products

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

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Deploy yellow sticky traps around the plant to capture flying adults and monitor the infestation levels.

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

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Sooty Mold (Secondary Infection)

While not the primary cause of stickiness, sooty mold is a black fungus that grows specifically on the honeydew left by piercing-sucking insects. It can coat the orange leaves, blocking photosynthesis.

Common

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How to confirm: Check if the sticky residue has turned into a dry, black, soot-like coating on the leaf surface.

build How to fix it

shopping_cart Recommended Products

1 Identify and treat the underlying pest infestation (such as aphids, scale, or whiteflies) that is producing the sticky honeydew using an organic insecticide.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

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

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