Anthurium andraeanum Cavalli White Cottony Spots - Causes & Fixes

Jump to cause: Mealybugs Pseudomonas bacteria (Bacterial Soft Rot) Botrytis cinerea (Gray Mold)

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Mealybugs

These small, soft-bodied insects secrete a white, waxy substance to protect themselves, which appears as cottony clumps on stems and leaf axils of Anthuriums. They feed on plant sap, causing yellowing and potential leaf drop.

Very Common

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How to confirm: Use a cotton swab dipped in rubbing alcohol to dab the white spots; if they dissolve and turn brown, it is likely mealybugs.

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

2 Treat the infestation by spraying the plant with an organic insecticide/miticide to kill the insects and their waxy coating.

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3 Use a cotton swab dipped in isopropyl alcohol to manually remove visible white cottony clumps from stems and leaf axils.

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Pseudomonas bacteria (Bacterial Soft Rot)

Certain bacterial strains can manifest as white, water-soaked lesions that may appear fuzzy or cottony as the tissue breaks down. This is common in high-humidity environments where airflow is restricted around the Anthurium foliage.

Common

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How to confirm: Check if the white spots are accompanied by a soft, mushy texture or a foul odor on the leaves.

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1 Immediately prune and discard all infected leaves and stems to prevent the bacteria from spreading to healthy tissue.

2 Apply a copper-based fungicide to the affected area to help control bacterial spread and protect remaining healthy foliage.

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3 Improve air circulation around the plant and reduce humidity levels to prevent the water-soaked conditions that bacteria thrive in.

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Botrytis cinerea (Gray Mold)

In high humidity, this fungus can produce white, fuzzy mycelium on the surface of the spathe or leaves. It thrives in stagnant air and can quickly spread across the Anthurium's fleshy structures.

Common

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How to confirm: Inspect if the white fuzz is spreading rapidly across dead or decaying leaf tissue during periods of low ventilation.

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shopping_cart Recommended Products

1 Prune and discard all infected leaves or spathes immediately to prevent the fungus from spreading to healthy tissue.

2 Apply an organic fungicide to the affected areas and surrounding foliage to control the spread of the mold.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

3 Improve air circulation around the plant and reduce humidity levels to create an environment less hospitable to Botrytis.