Glycine max Sticky Leaves - Causes & Fixes

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Aphid Infestation

Aphids feed on the phloem of soybean plants, excreting a sugary substance known as honeydew. This residue creates the characteristic sticky texture on leaf surfaces and can lead to sooty mold growth.

Very Common

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How to confirm: Inspect the undersides of young leaves and growing tips for small, pear-shaped 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 off the leaves using a gentle stream of water or a soft cloth to prevent sooty mold growth.

3 Monitor the plant regularly with yellow sticky traps to capture any remaining winged aphids.

Super Ninja Fungus Gnat Traps - 30 Pack

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Whitefly Infestation

Whiteflies are common pests in soybean crops that also excrete honeydew as they feed on plant sap. A heavy population can cause leaves to become sticky and eventually lead to leaf yellowing.

Very Common

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How to confirm: Gently shake a soybean stem to see if tiny white insects fly up from the foliage.

build How to fix it

shopping_cart Recommended Products

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

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Deploy yellow sticky traps around the soybean plants to capture adult whiteflies and monitor the infestation level.

Super Ninja Fungus Gnat Traps - 30 Pack

30 pcs

$7

In Stock

3 Gently wipe the sticky leaves with a damp cloth to remove honeydew buildup and prevent the growth of sooty mold.

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Scale Insects

Scale insects attach themselves to soybean stems and leaves, extracting nutrients and leaving behind sticky honeydew. Unlike aphids, these pests are often stationary and look like small bumps on the plant.

Common

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How to confirm: Examine the stems for small, hard, scale-like bumps that do not move when disturbed.

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shopping_cart Recommended Products

1 Apply an organic insecticide spray to the soybean 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 Wipe the leaves with a damp cloth to remove the sticky honeydew residue and prevent the growth of sooty mold.

3 Inspect the undersides of leaves and stems regularly to identify and manually remove any visible scale bumps.

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Sooty Mold (Secondary Infection)

While not a primary cause of stickiness, sooty mold grows on the honeydew left by sap-sucking insects. The presence of black, velvety fungal growth indicates an underlying insect problem.

Common

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How to confirm: Look for black, powdery coating on the leaves that can be wiped off with a damp cloth.

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shopping_cart Recommended Products

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