Brassica oleracea Red Kale Sticky Leaves - Causes & Fixes

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Aphid Infestation

Aphids are common pests on Red Kale that pierce the plant tissue to suck sap, excreting a sugary substance known as honeydew. This honeydew creates a visible sticky film on the leaf surfaces and can lead to sooty mold growth.

Very Common

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How to confirm: Inspect the undersides of the leaves and new growth for tiny, soft-bodied insects, often green or black in color.

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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 leaves with water to remove the sticky residue and prevent the development of sooty mold.

3 Inspect the undersides of leaves regularly and use yellow sticky traps to capture any remaining flying insects.

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Scale Insects

Scale insects attach themselves to the stems and leaves of Brassica species, feeding on sap and leaving behind sticky honeydew. Unlike aphids, these pests often look like small, stationary bumps or crusty patches on the plant.

Common

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How to confirm: Look for small, hard, scale-like bumps on the leaf petioles or main stems that can be scraped off with a fingernail.

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shopping_cart Recommended Products

1 Treat the plant with an organic insecticide to eliminate the scale insects and stop the production of honeydew.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Wipe the leaves and stems with a damp cloth to remove the sticky residue and prevent fungal growth.

3 Inspect the undersides of leaves and stems for any remaining stationary bumps to ensure the infestation is fully managed.

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Whitefly Infestation

Whiteflies feed on the underside of kale leaves, producing honeydew as they consume plant fluids. When the plant is disturbed, a small cloud of tiny white insects may emerge from the foliage.

Common

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How to confirm: Gently shake the kale plant and observe if a swarm of tiny white moths flies out from beneath the leaves.

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shopping_cart Recommended Products

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

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Place yellow sticky traps near the kale plants to capture adult whiteflies and prevent further reproduction.

Super Ninja Fungus Gnat Traps - 30 Pack

30 pcs

$7

In Stock

3 Wipe the sticky residue from the leaves with a damp cloth to prevent fungal growth and allow the plant to breathe.

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Sooty Mold (Secondary Infection)

While not the primary cause of stickiness, sooty mold is a black fungus that grows directly on the honeydew left by sap-sucking insects. It can coat the red pigments of the kale, making the leaves appear dark and grimy.

Common

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

build How to fix it

shopping_cart Recommended Products

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

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Gently wash the affected kale leaves with water to remove the black sooty mold residue and restore the plant's natural red pigment.

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