Bryophyllum pinnatum White Cottony Spots - Causes & Fixes

Jump to cause: Mealybugs Powdery Mildew Cottony Blight (Sclerotinia)

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Mealybugs

Mealybugs are small, soft-bodied insects that secrete a white, waxy, cotton-like substance to protect themselves. They congregate on the fleshy leaves and stem nodes of Bryophyllum pinnatum, sucking sap and causing leaf distortion.

Very Common

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How to confirm: Use a magnifying glass to look for tiny, moving insects tucked into the crevices where the leaves meet the stem.

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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 or neem oil to kill the insects and remove the waxy coating.

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3 Gently wipe away visible white cottony clusters from the leaves and stems using a cotton swab dipped in isopropyl alcohol.

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Powdery Mildew

This fungal disease presents as white, flour-like patches on the leaf surface. In Bryophyllum, high humidity and poor air circulation around the thick succulent leaves can trigger spore germination.

Common

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How to confirm: Check if the white spots can be rubbed off with your finger; if they smear or leave a residue, it is likely fungal rather than insect-based.

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1 Apply an organic fungicide to the affected leaves to eliminate the powdery mildew spores and prevent further spread.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Improve air circulation around the plant and reduce humidity by avoiding overhead watering on the succulent leaves.

3 Prune and dispose of any heavily infected leaves to prevent the fungus from spreading to healthy parts of the plant.

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Cottony Blight (Sclerotinia)

Certain fungal pathogens can cause white, fuzzy mycelium to grow on the surface of succulent plant tissues. This usually occurs if the plant is kept in overly damp soil or high-humidity environments.

Common

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How to confirm: Inspect the base of the leaves for any signs of softening or dark, mushy decay accompanying the white fuzz.

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1 Remove all affected plant tissue and any visible white fuzzy growth immediately to prevent the fungus from spreading to healthy parts of the plant.

2 Apply an organic fungicide to the affected areas and ensure the plant is moved to a location with better airflow and lower humidity.