Anthurium andraeanum Cirano White Cottony Spots - Causes & Fixes

Jump to cause: Mealybugs Cottony Scale Botrytis cinerea (Gray Mold)

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Mealybugs

These small insects secrete a white, waxy, cotton-like substance to protect themselves while feeding on the sap of the Anthurium leaves and stems. They tend to cluster in the axils where the leaf meets the stem.

Very Common

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How to confirm: Inspect the undersides of leaves and stem nodes for tiny, moving white insects or sticky residue.

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1 Isolate the plant immediately to prevent the mealybugs from spreading to your other houseplants.

2 Manually remove visible mealybug clusters using a cotton swab dipped in isopropyl alcohol to dissolve their protective waxy coating.

3 Apply an organic insecticide spray to the entire plant, focusing on the leaf axils, to eliminate remaining insects and larvae.

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Cottony Scale

Similar to mealybugs, these pests create a white, felt-like covering over their bodies. They attach firmly to the plant tissue and can cause yellowing or leaf drop if left untreated.

Common

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How to confirm: Check if the white spots are stationary and harder to move than mealybugs by gently probing with a cotton swab soaked in alcohol.

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1 Isolate the plant immediately to prevent the scale from spreading to other houseplants and treat the visible white spots with an organic insecticide spray.

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 individual scale insects from the stems and leaves to reduce the infestation.

3 Wipe down the leaves and surrounding pot surfaces to remove any leftover scale eggs or residue.

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Botrytis cinerea (Gray Mold)

In high humidity, this fungus can manifest as white, fuzzy patches on decaying organic matter or leaf tissue. While typically gray, early stages of fungal colonization can appear as pale, cottony spots.

Common

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How to confirm: Look for soft, decaying tissue underneath the white fuzz and check if humidity levels in your growing area are excessively high.

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1 Prune and remove all infected leaves or decaying organic matter immediately to prevent the fungal spores from spreading to healthy tissue.

2 Apply an organic fungicide to the affected area to control the spread of the Botrytis cinerea fungus.