Lily New Wave White Cottony Spots - Causes & Fixes

Jump to cause: Mealybugs Botrytis Blight (Gray Mold) Powdery Mildew

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Mealybugs

Mealybugs are small, soft-bodied insects that secrete a white, waxy, cottony substance to protect themselves. They congregate in the crevices of Lily New Wave leaves and flower buds, sucking sap and causing stunted growth.

Very Common

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How to confirm: Inspect the base of the leaves and flower stalks for tiny, slow-moving white insects hiding under the fluff.

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1 Isolate the plant immediately to prevent the mealybugs from spreading to your other houseplants.

2 Apply an organic insecticide spray to the plant, ensuring you coat the undersides of leaves and crevices where the white waxy substance is visible.

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3 Use a cotton swab dipped in rubbing alcohol to manually remove any visible mealybug clusters from the leaf joints and buds.

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Botrytis Blight (Gray Mold)

This fungal pathogen thrives in high humidity around Lily New Wave blooms. While often appearing gray, early stages of mycelium growth can appear as fuzzy, white patches on petals and decaying foliage.

Common

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How to confirm: Check if the white spots are accompanied by brown, rotting tissue or water-soaked lesions on the petals.

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1 Immediately remove and dispose of all infected flowers and decaying foliage to prevent the fungal spores from spreading to healthy parts of the plant.

2 Apply an organic fungicide to the affected areas to control the spread of the Botrytis pathogen.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

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3 Improve air circulation around the Lily and reduce humidity by avoiding overhead watering, ensuring the soil surface stays dry.

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Powdery Mildew

This fungal disease presents as a white, flour-like coating on the surface of the leaves. It is common in Lilies when there is poor air circulation or high humidity during warm days.

Common

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How to confirm: Rub the white spots with your finger; if it wipes off easily like dust and reveals green leaf underneath, it is likely powdery mildew.

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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

0.9 L • 1 pcs • Organic

$12

In Stock

2 Improve air circulation around your Lily by spacing plants further apart and ensuring they are not in overly humid, stagnant areas.

3 Prune and dispose of any heavily infected leaves to reduce the fungal load in your growing environment.