Lily Contegem White Cottony Spots - Causes & Fixes

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

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Mealybugs

These small insects secrete a white, waxy, cotton-like substance to protect themselves while feeding on the sap of Lily Contegem. They often cluster at the leaf axils and base of the flower buds.

Very Common

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How to confirm: Use a magnifying glass to look for tiny, slow-moving insects hidden under the white fluff near the stem nodes.

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

2 Apply an organic insecticide spray to the affected areas, ensuring you coat the white cottony clusters and leaf axils thoroughly.

Bonide Captain Jack's Neem Oil 32 oz

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3 Use a cotton swab dipped in isopropyl alcohol to manually remove visible insect clusters from the flower buds and stems.

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Botrytis cinerea (Gray Mold)

While typically associated with gray fuzz, early stages of Botrytis on Easter Lilies can appear as pale, fuzzy patches on petals or leaves. This fungus thrives in high humidity and poor air circulation around the lily foliage.

Common

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How to confirm: Check if the white spots are accompanied by soft, decaying tissue or brown necrotic lesions on the flower petals.

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1 Remove and discard 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

0.9 L • 1 pcs • Organic

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3 Improve air circulation around the lily and reduce humidity by avoiding overhead watering and ensuring the plant is not in a crowded area.

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Powdery Mildew

This fungal disease manifests as a white, powdery coating on the surface of the Lily Contegem leaves. It is caused by fungal spores that thrive in warm, dry days and cool, damp nights.

Common

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How to confirm: Rub the white spot with your finger; if it wipes off easily like flour or dust, it is likely powdery mildew.

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shopping_cart Recommended Products

1 Apply an organic fungicide to eliminate existing fungal spores and prevent the spread of the white coating.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

2 Improve air circulation around the lily by spacing plants further apart and pruning any heavily infected foliage.

3 Avoid overhead watering to keep the leaves dry, as moisture on the foliage encourages spore germination.