Lily R.Dazzle 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 the lily's scales and leaf axils, sucking sap from the plant.

Very Common

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How to confirm: Use a magnifying glass to check for tiny, moving white insects near the base of the flower buds or leaf junctions.

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1 Isolate the lily from other plants immediately to prevent the mealybugs from spreading to your entire collection.

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 Gently wipe away any remaining visible mealybugs and cottony residue using a cotton swab dipped in isopropyl alcohol.

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Botrytis Blight (Gray Mold)

This fungal pathogen thrives in high humidity and can manifest as fuzzy, light-colored patches on lily petals or leaves. If the 'cottony' spots appear more like a fine mold on decaying tissue, it is likely Botrytis.

Common

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How to confirm: Inspect if the white patches are accompanied by soft, brown, or decaying tissue on the lily petals.

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1 Prune and remove all infected petals and leaves immediately to prevent the fungus from spreading to healthy tissue.

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

Bonide Captain Jack's Copper Fungicide 32 oz

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3 Improve air circulation around the plant and reduce humidity by avoiding overhead watering.

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Powdery Mildew

This fungal disease produces a white, flour-like coating on the surface of the Oriental lily leaves. It is caused by high humidity and poor air circulation around the foliage.

Common

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How to confirm: Check if the white substance looks like a powdery dust that can be easily rubbed off with your finger.

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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 lilies by spacing plants further apart and pruning dense foliage to reduce humidity.

3 Avoid overhead watering, which can spread fungal spores; instead, use a watering can to target the soil directly.