Lily Navona White Cottony Spots - Causes & Fixes

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

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Mealybugs

These small, soft-bodied insects secrete a white, waxy, cotton-like substance to protect themselves while feeding on the sap of the Lily Navona. They often cluster in the crevices between leaf sheaths and near the base of the flower stalks.

Very Common

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How to confirm: Use a cotton swab dipped in rubbing alcohol to dab the spots; if they dissolve and turn brown, it is likely mealybugs.

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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 remove the waxy coating.

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 clusters from leaf crevices and flower stalks.

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Powdery Mildew

This fungal disease manifests as white, powdery patches on the surface of the leaves, appearing like flour dusted on the Lily Navona foliage. It thrives in high humidity and poor air circulation around the plant.

Common

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How to confirm: Check if the white spots appear more like a fine dust on the leaf surface rather than raised, distinct clumps.

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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 the Lily Navona by spacing plants further apart and reducing humidity levels.

3 Prune and dispose of heavily infected leaves to prevent the fungus from spreading to healthy foliage.

Fiskars 5/8" Bypass Pruning Shears

Cutting Tools

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Cottony Blotch (Botrytis cinerea)

While typically associated with browning, early stages of Botrytis can present as fuzzy, grayish-white patches on the tender tissues of lily blooms and foliage. This fungus attacks weakened plant parts during periods of high moisture.

Common

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How to confirm: Inspect the underlying tissue for any signs of brown, soft rot or mushy stems accompanying the white fuzz.

build How to fix it

shopping_cart Recommended Products

1 Prune and remove all affected foliage and blooms immediately to prevent the fungal spores from spreading to healthy plant parts.

2 Apply an organic fungicide to protect remaining healthy tissues and control the spread of the Botrytis fungus.

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 reduce overhead watering to ensure the foliage dries quickly after moisture exposure.