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Lily Terisina White Cottony Spots
eco White Cottony Spots

Lily Terisina – White Cottony Spots

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

yard View full Lily Terisina care guide
Jump to cause: Mealybugs Powdery Mildew Cottony Blotch (Botrytis cinerea) Scale Insects (Cottony Form)

search Possible Causes

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Mealybugs

These small insects produce a white, waxy, cotton-like secretion to protect themselves. They cluster in the crevices of Terisina Lily leaves and stems, sucking sap and weakening the plant.

Very Common
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How to confirm: Inspect the undersides of leaves and stem junctions for tiny, moving white insects or sticky residue.
build How to fix it
shopping_cart Recommended Products
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 waxy coatings.
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
3 Use a cotton swab dipped in isopropyl alcohol to manually remove visible white cottony clusters from the crevices of the leaves and stems.
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Powdery Mildew

A fungal disease that presents as a white, flour-like coating on the leaf surfaces. It thrives in high humidity and stagnant air around the lily's foliage.

Very Common
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How to confirm: Check if the white spots look like dust that can be wiped off with a finger rather than fuzzy clusters.
build How to fix it
shopping_cart Recommended Products
1 Apply an organic fungicide to the affected leaves to eliminate the powdery mildew fungus and prevent further spread.
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
2 Improve air circulation around the foliage and reduce humidity by spacing plants further apart and avoiding overhead watering.
3 Prune and dispose of any heavily infected leaves to prevent the fungal spores from contaminating healthy parts of the plant.
Fiskars 5/8" Bypass Pruning Shears
Fiskars 5/8" Bypass Pruning Shears
Cutting Tools
$13
In Stock
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Cottony Blotch (Botrytis cinerea)

This fungus causes soft, decaying spots that eventually develop a greyish-white mold-like appearance. It is common in lilies when moisture lingers too long on the foliage.

Common
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How to confirm: Look for signs of tissue softening or browning underneath the white fuzzy patches.
build How to fix it
shopping_cart Recommended Products
1 Prune and remove all infected foliage immediately to prevent the fungus from spreading to healthy parts of the plant.
2 Apply an organic fungicide to treat the existing infection and protect new growth.
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 around the plant and avoid overhead watering to ensure moisture does not linger on the leaves.
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Scale Insects (Cottony Form)

Certain types of scale insects can appear as white, cottony masses on the plant. They attach firmly to the Lily's stems and disrupt nutrient flow.

Common
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How to confirm: Try to scrape a spot with a fingernail; if it is a hard, stationary shell, it is likely scale rather than mealybugs.
build How to fix it
shopping_cart Recommended Products
1 Apply an organic insecticide spray to the plant to eliminate the scale insects and their eggs.
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 Manually remove visible white cottony masses using a cotton swab dipped in rubbing alcohol to prevent further damage to the stems.
3 Inspect the undersides of leaves and crevices for any remaining pests to prevent a secondary infestation.

Other Lily Terisina problems

Your plant might also be experiencing one of these issues:

eco Sudden Leaf Drop chevron_right
local_hospital All symptoms eco All plants with white cottony spots
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