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Haworthia truncata White Cottony Spots
eco White Cottony Spots

Haworthia truncata – White Cottony Spots

Why does your Haworthia truncata have white cottony spots? Diagnose the cause and fix it with our step-by-step guide.

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Jump to cause: Mealybug Infestation Scale Insects Sclerotinia or Saprophytic Fungal Growth

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Mealybug Infestation

Mealybugs are small, soft-bodied insects that secrete a white, waxy, cottony substance to protect themselves. In Haworthia truncata, they often hide in the crevices between leaves or near the base of the plant.

Very Common
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How to confirm: Use a toothpick to gently probe the white spots; if the mass breaks apart and reveals tiny moving insects, it is mealybugs.
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1 Isolate the Haworthia immediately from other plants to prevent the mealybugs from spreading to your entire collection.
2 Carefully remove visible mealybugs using a cotton swab dipped in isopropyl alcohol, making sure to clean the crevices near the leaf bases.
3 Apply an organic insecticide spray to the plant to eliminate any remaining insects and larvae.
Bonide Captain Jack's Neem Oil 32 oz
Bonide Captain Jack's Neem Oil 32 oz
0.9 L • 1 pcs • Organic
$10
In Stock
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Scale Insects

While scale often looks like hard bumps, some species can produce fine white filaments or appear fuzzy during certain life stages. They suck the sap from the succulent leaves, weakening the plant's structure.

Common
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How to confirm: Check if the white spots are firmly attached to the leaf surface and if there is any sticky residue (honeydew) underneath them.
build How to fix it
shopping_cart Recommended Products
1 Treat the plant with an organic insecticide spray to eliminate the scale insects and their life stages.
Bonide Captain Jack's Neem Oil 32 oz
Bonide Captain Jack's Neem Oil 32 oz
0.9 L • 1 pcs • Organic
$10
In Stock
2 Carefully wipe the white cottony spots and any visible insects off the leaves using a cotton swab dipped in isopropyl alcohol.
3 Isolate the Haworthia from other houseplants to prevent the scale insects from spreading to your healthy plants.
warning

Sclerotinia or Saprophytic Fungal Growth

If the plant has experienced high humidity or localized rot, white fungal mycelium can appear as cottony patches on decaying organic matter or wounded leaf tissue.

Common
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How to confirm: Inspect the base of the 'windowed' leaves for any signs of soft, translucent, or mushy tissue accompanying the white growth.
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shopping_cart Recommended Products
1 Remove any decaying or heavily infected leaf tissue using sterilized tools to prevent the fungus from spreading to the core of the plant.
Fiskars 5/8" Bypass Pruning Shears
Fiskars 5/8" Bypass Pruning Shears
Cutting Tools
$13
In Stock
2 Apply an organic fungicide to the affected area to control fungal growth and protect healthy tissue.
Bonide Captain Jack's Copper Fungicide 32 oz
Bonide Captain Jack's Copper Fungicide 32 oz
0.9 L • 1 pcs • Organic
$12
In Stock
3 Improve air circulation and reduce humidity around the plant, and ensure the soil is not staying waterlogged by using a moisture meter to monitor levels.
GROWIT Soil Moisture Meter SMM-V3
GROWIT Soil Moisture Meter SMM-V3
Water Meters
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