Haworthia tessellata White Cottony Spots - Causes & Fixes

Jump to cause: Mealybugs Cottony Scale Fungal Mold (Sclerotinia or similar)

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Mealybugs

Mealybugs are small, sap-sucking insects that secrete a white, waxy, cotton-like substance to protect themselves. They often cluster in the crevices between the fleshy leaves of Haworthia tessellata, causing leaf yellowing and potential rot.

Very Common

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How to confirm: Use a soft paintbrush with isopropyl alcohol to dab the spots; if they dissolve and the insect moves, it is mealybugs.

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1 Isolate the plant immediately to prevent the spread of mealybugs to other houseplants.

2 Treat the infestation by spraying the plant with an organic insecticide or neem oil to kill the insects and their waxy coating.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

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

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Cottony Scale

Similar to mealybugs, these pests produce a white filamentous covering. They attach firmly to the base of the leaves and can cause the Haworthia to lose its characteristic tessellated pattern due to stress.

Common

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How to confirm: Check if the white spots are firmly attached to the leaf surface rather than loose like dust.

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shopping_cart Recommended Products

1 Isolate the plant immediately to prevent the spread of scale to other houseplants and treat the visible white spots with an organic insecticide spray.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Use a cotton swab dipped in isopropyl alcohol to manually remove the scale insects from the base of the leaves to prevent further damage to the plant's pattern.

3 Monitor the soil moisture levels to ensure the plant is not overly damp, as excess moisture can encourage pest and fungal issues.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

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Fungal Mold (Sclerotinia or similar)

High humidity and poor airflow can cause fungal mycelium to appear as white, fuzzy patches on the plant tissue. In Haworthia, this often accompanies soft, translucent spots on the leaves.

Common

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How to confirm: Check if the white fuzz is accompanied by soft, mushy, or translucent areas on the leaf flesh.

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1 Apply an organic fungicide to the affected areas to stop the spread of fungal mycelium.