Crassula dejecta White Cottony Spots - Causes & Fixes

Jump to cause: Mealybug Infestation Cottony Scale Powdery Mildew

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Mealybug Infestation

The white, cottony masses are characteristic of mealybugs, which secrete a waxy substance to protect themselves while they suck sap from the Crassula's stems and leaves. This can lead to leaf drop and stunted growth in your Trailing Jade.

Very Common

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How to confirm: Use a cotton swab dipped in rubbing alcohol to dab the white spots; if the white material dissolves and reveals small insects, it is 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 or neem oil to kill the insects and their eggs.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

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

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Cottony Scale

Scale insects can produce white, fuzzy accumulations that mimic mealybugs. These pests attach to the succulent stems of Crassula dejecta and drain the plant's energy reserves.

Common

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How to confirm: Check if the white spots are firmly attached to the stem or if they can be easily moved/wiped away like dust.

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1 Treat the affected stems with an organic insecticide spray to eliminate the scale insects and their eggs.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Manually remove visible white cottony clusters using a cotton swab dipped in isopropyl alcohol to prevent further spread.

3 Improve airflow around the plant and avoid overwatering to create an environment less hospitable to pests.

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Powdery Mildew

While less common in succulents due to their low moisture foliage, high humidity can cause fungal spores to appear as a white, dusty coating on the leaves of Crassula.

Common

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How to confirm: Observe if the white spots look more like a fine dust that spreads across the leaf surface rather than distinct cottony clumps.

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shopping_cart Recommended Products

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

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 levels to prevent further fungal development.

3 Prune and discard any heavily infected foliage to prevent the mildew from spreading to healthy parts of the Crassula.