Dendrobium bigibbum Sticky Leaves - Causes & Fixes

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Scale Insects

Scale insects attach to the canes and leaves of your Dendrobium, piercing the plant tissue to suck sap and excreting honeydew, which creates a sticky residue. This sugary substance can also lead to secondary black sooty mold growth.

Very Common

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How to confirm: Inspect the nodes and undersides of leaves for small, stationary, shell-like bumps that cannot be easily wiped off.

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1 Apply an organic insecticide spray to the plant to kill existing scale insects and their eggs.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

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

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

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Aphid Infestation

Aphids are soft-bodied insects that congregate on new growth and flower buds of Dendrobium bigibbum, feeding on sap and secreting honeydew. Their presence often results in distorted leaf growth alongside the stickiness.

Very Common

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How to confirm: Look for tiny, fast-moving green or black insects clustered around the tender new shoots and leaf tips.

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1 Spray the plant thoroughly with an organic insecticide to eliminate the aphid population and stop the secretion of honeydew.

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 residue and prevent the growth of sooty mold.

3 Inspect new growth and flower buds regularly to ensure no new aphids are colonizing the plant.

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Mealybugs

Mealybugs are related to scale and produce honeydew, but they are easily identified by their white, cottony/waxy appearance. They tend to hide in the crevices where the leaves meet the pseudobulbs.

Common

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How to confirm: Use a magnifying glass to check for small, white, fuzzy clusters tucked into the leaf axils of the orchid.

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

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Use a cotton swab dipped in isopropyl alcohol to manually remove visible white, cottony clusters from the crevices of the pseudobulbs.

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

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Excessive Liquid Fertilizer Residue

Over-application of high-nitrogen fertilizers can leave unabsorbed mineral salts and sugary residues on the surface of the leaves. This creates a tacky film that is not biological in origin but mimics pest honeydew.

Common

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How to confirm: Check if the stickiness is evenly distributed across the entire plant and if there are visible white salt crusts on the medium or pot rim.

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1 Gently wipe the leaves with a soft cloth dampened with lukewarm water to remove the sticky mineral and sugar residue.

2 Flush the potting medium with plenty of fresh water to wash away excess fertilizer salts from the root zone.

3 Adjust your feeding schedule to a more diluted concentration, using a balanced liquid fertilizer like FoxFarm Grow Big to prevent future salt buildup.