Begonia x semperflorens cultorum Sticky Leaves - Causes & Fixes

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Aphid Infestation

Aphids are common pests on Wax Begonias that pierce the plant tissue to suck sap, excreting a sugary substance called honeydew. This residue creates a distinct sticky coating on the leaf surfaces and stems.

Very Common

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

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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 Wipe the sticky residue off the leaves with a damp cloth to prevent fungal growth like sooty mold.

3 Place yellow sticky traps near the plant to capture any remaining flying aphids and monitor for new arrivals.

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Scale Insects

Scale insects attach themselves to the stems and leaves of Begonias, feeding on phloem sap and releasing honeydew. Unlike aphids, these pests often look like small, stationary bumps or scales on the plant.

Very Common

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How to confirm: Look for immobile, brownish or white bumps on the stems that can be scraped off with a fingernail.

build How to fix it

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 Physically remove visible scale insects from stems and leaves using a cotton swab dipped in isopropyl alcohol.

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

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Whitefly Infestation

Whiteflies congregate on the undersides of Begonia leaves to feed, leaving behind a sticky residue that can eventually lead to sooty mold growth. They are often visible as small white flying insects when the plant is disturbed.

Common

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How to confirm: Gently shake the plant and watch for tiny white insects fluttering around the foliage.

build How to fix it

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 near the plant to capture adult whiteflies and monitor the infestation levels.

Super Ninja Fungus Gnat Traps - 30 Pack

30 pcs

$7

In Stock

3 Gently wipe the leaves with a damp cloth to remove the existing sticky residue and prevent sooty mold from developing.

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Sooty Mold Growth

While not a direct cause of stickiness, sooty mold is a fungus that grows on the honeydew left by sucking insects. It appears as a black, velvety coating that can make the leaves feel tacky and block photosynthesis.

Common

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How to confirm: Check if the sticky residue is accompanied by a dark, soot-like film covering the leaf surface.

build How to fix it

shopping_cart Recommended Products

1 Identify and eliminate the underlying pest source, such as aphids, whiteflies, or scale, which produce the sticky honeydew that feeds the mold.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Gently wipe the black, velvety coating off the leaves using a soft cloth and a mild insecticidal soap solution to restore photosynthesis.