Brassica campestris Sticky Leaves - Causes & Fixes

Jump to cause: Aphid Infestation Cabbage White Butterfly Larvae (Caterpillar) Feeding Scale Insect Infestation

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Aphid Infestation

Aphids are highly common on Brassica species and secrete 'honeydew,' a sticky, sugar-rich substance. This residue can coat the leaves and often leads to the growth of black sooty mold.

Very Common

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How to confirm: Inspect the undersides of the leaves and new growth for clusters of tiny, soft-bodied insects.

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

3 Monitor the plant closely using yellow sticky traps to capture any remaining winged aphids and prevent re-infestation.

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Cabbage White Butterfly Larvae (Caterpillar) Feeding

While caterpillars themselves don't produce honeydew, their feeding activity often attracts secondary pests like aphids or scales that do. The combination of chewed leaf margins and sticky residue is a classic sign of a complex pest issue.

Common

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How to confirm: Look for irregular holes in the leaves or small green larvae hiding near the stem base.

build How to fix it

shopping_cart Recommended Products

1 Inspect the undersides of leaves for caterpillars and remove them manually or use an organic insecticide to target larvae and secondary pests.

Bonide Captain Jack's Deadbug Brew 16 oz

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2 Wash the sticky residue off the leaves with a gentle stream of water or use insecticidal soap to clean the plant and disrupt pest feeding.

Bonide Captain Jack's Insecticidal Super Soap 32 oz

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3 Monitor the plant closely for new larvae or aphid activity using yellow sticky traps to catch flying pests.

Super Ninja Fungus Gnat Traps - 30 Pack

30 pcs

$7

In Stock

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Scale Insect Infestation

Scale insects attach themselves to the stems and leaves of Brassica plants and excrete honeydew as they feed on plant sap. Unlike aphids, these pests may look like small, stationary bumps or crusty patches.

Common

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How to confirm: Check if the sticky substance is accompanied by small, hard, or waxy bumps on the leaf veins or stems.

build How to fix it

shopping_cart Recommended Products

1 Apply an organic insecticide spray to the plant 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 Physically remove visible scale insects and crusty patches from stems and leaves using a soft cloth or cotton swab dipped in rubbing alcohol.

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