Lilium OT Revelation White Cottony Spots - Causes & Fixes

Jump to cause: Powdery Mildew Mealybug Infestation Cottony Blotch (Botrytis cinerea)

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Powdery Mildew

This fungal disease is highly common in Lilium species when humidity is high and airflow is poor. It manifests as a white, flour-like coating on the surface of the leaves, which can eventually lead to leaf necrosis.

Very Common

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How to confirm: Check if the white spots appear powdery or dusty and can be rubbed off with your finger.

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1 Apply an organic fungicide to the affected leaves to eliminate the fungal spores and prevent further spread.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

2 Prune and dispose of heavily infected leaves to reduce the fungal load on the plant, ensuring you do not compost them.

3 Improve air circulation around the lily and reduce humidity by avoiding overhead watering, which keeps the foliage dry.

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Mealybug Infestation

Mealybugs are small insects that secrete a white, waxy, cotton-like substance to protect themselves. They congregate in the crevices of the lily petals and leaf axils, sucking the sap from the plant.

Common

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How to confirm: Inspect the undersides of leaves and stem nodes for tiny, slow-moving insects covered in white fuzz.

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1 Isolate the lily from other plants and use a cotton swab dipped in isopropyl alcohol to manually remove the visible white cottony masses from the petals and leaf axils.

2 Apply an organic insecticide spray to the entire plant, ensuring you coat the crevices where mealybugs hide, to eliminate remaining insects and larvae.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

3 Monitor the plant's soil moisture levels to ensure the plant is not overly wet, as high humidity can encourage pest resurgence.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

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Cottony Blotch (Botrytis cinerea)

While often associated with petal rot, Botrytis can manifest as fuzzy grey or white patches on lily foliage in damp conditions. This fungus thrives in the dense, overlapping leaf structure of OT Hybrids like Revelation.

Common

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How to confirm: Observe if the white spots are accompanied by soft, decaying tissue or browning of the leaf edges.

build How to fix it

shopping_cart Recommended Products

1 Prune and remove all infected foliage and flower heads immediately to prevent the fungus from spreading to healthy parts of the plant.

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

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

3 Improve air circulation around the dense foliage and avoid overhead watering to ensure the leaves dry quickly after moisture exposure.