Othonna capensis White Cottony Spots - Causes & Fixes

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

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Mealybugs

These small, sap-sucking insects produce a white, waxy, cotton-like secretion to protect themselves. On Othonna capensis, they often congregate in the crevices between the succulent segments or near the base of the plant.

Very Common

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How to confirm: Use a magnifying glass or toothpick to see if the white spots move or are attached to the plant tissue.

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

2 Carefully remove visible mealybugs using a cotton swab dipped in isopropyl alcohol, paying close attention to the crevices between succulent segments.

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

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Powdery Mildew

This fungal pathogen manifests as a fine, white powdery coating on the surface of the succulent leaves. It thrives in environments with high humidity and poor air circulation around the dense foliage of the String of Pickles.

Common

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How to confirm: Check if the white spots can be easily wiped off the surface of the segments with your finger.

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

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2 Improve air circulation around the dense foliage and reduce humidity by avoiding overhead watering.

3 Prune away any heavily infected stems to prevent the fungus from spreading to healthy parts of the plant.

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Cottony Blight (Botrytis)

In conditions of excessive moisture, Botrytis can cause greyish-white fuzzy growth, particularly on decaying plant tissue. This is common if the succulent's soil remains damp for too long.

Common

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How to confirm: Inspect the base of the stems to see if the white patches are accompanied by soft, mushy, or rotting segments.

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1 Remove all affected plant tissue and any decaying leaves immediately to prevent the fungus from spreading to healthy parts of the succulent.

2 Apply an organic fungicide spray to the remaining healthy tissue to control the spread of the blight.

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3 Improve air circulation and ensure the soil is allowed to dry out completely between waterings; use a moisture meter to monitor soil levels and prevent future overwatering.