Portulacaria afra variegata White Cottony Spots - Causes & Fixes

Jump to cause: Mealybugs Cottony Blister Scale Powdery Mildew

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Mealybugs

These small, soft-bodied insects secrete a white, waxy, cotton-like substance to protect themselves. In Portulacaria afra, they often cluster in the crevices between the fleshy leaves and stems.

Very Common

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How to confirm: Use a cotton swab dipped in rubbing alcohol to touch the 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 clusters from the crevices of the stems and leaves.

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Cottony Blister Scale

While less common than mealybugs, certain scale insects produce a white, fuzzy coating as they mature. They attach themselves to the stems of the Dwarf Jade and suck the sap, causing localized swelling.

Common

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How to confirm: Check if the white spots are firmly attached to the stem and cannot be easily brushed away like dust.

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1 Treat the plant with an organic insecticide/miticide spray to eliminate the scale insects and their white fuzzy coating.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Manually remove visible scale insects and any heavily infested stems using a cotton swab dipped in isopropyl alcohol.

3 Inspect surrounding plants and clean the area to prevent the spread of the scale infestation.

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Powdery Mildew

This fungal disease manifests as a white, dusty coating on the leaf surfaces. It thrives in environments with high humidity and poor air circulation around the dense foliage of the plant.

Common

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How to confirm: Observe if the white substance looks like fine flour dusted on the leaves rather than distinct tufts of cotton.

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1 Apply an organic fungicide to eliminate the fungal spores on the leaf surfaces.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Improve air circulation around the dense foliage and reduce humidity to prevent the fungus from spreading.

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