Dendrobium victoriae reginae Sticky Leaves - Causes & Fixes

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Scale Insects

Scale insects attach themselves to the pseudobulbs and leaves of the Dendrobium, secreting honeydew as they feed on plant sap. This sugary residue creates a thick, sticky coating on the leaf surfaces.

Very Common

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How to confirm: Inspect the underside of leaves and along the stems for small, hard, brown or tan bumps that do not move.

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

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2 Physically remove visible scale insects from the pseudobulbs and leaves using a cotton swab dipped in rubbing alcohol.

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

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Aphid Infestation

Aphids are soft-bodied insects that congregate on new growth and flower buds of Dendrobiums, excreting large amounts of honeydew. This often leads to a sticky film accompanied by leaf curling.

Very Common

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How to confirm: Look for tiny, pear-shaped green or black insects clustered around the tender new growth tips.

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1 Apply an organic insecticide spray to the plant to eliminate existing aphids and prevent further honeydew production.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Carefully wipe the sticky residue from the leaves using a soft cloth and water to prevent the growth of sooty mold.

3 Inspect the undersides of leaves and new growth regularly to catch any remaining pests before they multiply.

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Mealybugs

Mealybugs produce honeydew while feeding on the nutrient-rich sap of the orchid. Their presence is often signaled by sticky leaves and white, cottony masses in the leaf axils.

Common

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How to confirm: Use a magnifying glass to check for white, waxy filaments tucked into the junctions where leaves meet the stem.

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1 Isolate the orchid immediately to prevent the spread of mealybugs to other plants and use a cotton swab dipped in alcohol to manually remove visible white cottony masses.

2 Apply an organic insecticide spray to the entire plant, ensuring you coat the leaf axils where pests hide, to eliminate existing insects and larvae.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

3 Wipe the sticky leaves with a damp cloth to remove honeydew buildup, which can otherwise encourage the growth of sooty mold.

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Sooty Mold

This is a secondary fungal growth that thrives on the honeydew left behind by sap-sucking insects. While the mold itself isn't the primary cause, it creates a black, velvety, sticky appearance on the foliage.

Common

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

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

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Gently wipe the black, velvety mold off the leaves using a soft cloth dampened with water or a mild insecticidal soap to restore photosynthesis.