Cotyledon orbiculata oophylla White Cottony Spots - Causes & Fixes

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

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Mealybugs

The white, cottony masses are characteristic of mealybug colonies, which feed on the sap of Cotyledon orbiculata. They often cluster in the crevices between the fleshy leaves where moisture accumulates.

Very Common

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How to confirm: Use a toothpick to gently probe the white spots; if they move or reveal small insects underneath, it is mealybugs.

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1 Isolate the plant immediately from other greenery to prevent the mealybugs from spreading to your entire collection.

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

3 Apply an organic insecticide spray to the plant to eliminate any remaining insects and larvae.

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Powdery Mildew

This fungal pathogen manifests as a white, flour-like coating on the leaf surfaces. It thrives in high humidity and poor air circulation around the succulent leaves of the Pig's Ear.

Common

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How to confirm: Check if the white spots can be wiped off easily with a damp cloth or if they appear more like a fuzzy growth integrated into the leaf surface.

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1 Treat the affected leaves immediately with an organic fungicide to stop the spread of the fungal spores.

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2 Improve air circulation around the plant and reduce humidity by avoiding overhead watering and ensuring the plant is not crowded.

3 Prune and dispose of any heavily infected leaves to prevent the pathogen from spreading to healthy foliage.

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Cottony Blight (Botrytis)

In high-moisture environments, Botrytis can cause grayish-white fuzzy patches on succulent tissues. This is usually accompanied by soft, decaying spots on the fleshy leaves.

Common

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How to confirm: Inspect the base of the white spots for any signs of softening or mushy texture in the leaf tissue.

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1 Prune away any soft, decaying, or fuzzy leaves immediately using sterilized shears to prevent the fungus from spreading to healthy tissue.