Zantedeschia Captain Romance White Powder - Causes & Fixes

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Powdery Mildew

This fungal pathogen thrives in high humidity and poor air circulation around the large foliage of Calla Lilies. It manifests as white, flour-like patches on the leaves, which can eventually lead to leaf yellowing and necrosis.

Very Common

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How to confirm: Inspect the undersides of the leaves for fuzzy white growth that cannot be easily wiped away.

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

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2 Improve air circulation around the foliage and reduce humidity by spacing plants further apart and avoiding overhead watering.

3 Prune and dispose of heavily infected leaves to prevent the mildew from spreading to healthy parts of the plant.

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Mealybugs

These sap-sucking insects secrete a white, cottony, waxy substance to protect themselves. They tend to cluster in the crevices where the leaf petioles meet the rhizome of the Zantedeschia.

Common

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How to confirm: Use a magnifying glass to look for small, moving white insects nestled in the leaf axils.

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shopping_cart Recommended Products

1 Treat the plant with an organic insecticide spray to eliminate existing mealybug colonies and kill larvae.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Manually remove visible white cottony clusters using a cotton swab dipped in isopropyl alcohol to prevent further spreading.

3 Inspect the crevices where leaf petioles meet the rhizome and ensure the plant is in a well-ventilated area to discourage pest buildup.

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Botrytis Blight

While usually characterized by brown rot, early stages of Botrytis can appear as light-colored, fuzzy patches on the spadix or leaf edges in damp conditions. This fungus attacks the tender tissues of Calla Lilies during periods of high moisture.

Common

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How to confirm: Check if the white patches are accompanied by soft, decaying tissue on the flower spathe.

build How to fix it

shopping_cart Recommended Products

1 Remove and discard all infected leaves and flowers immediately to prevent the fungal spores from spreading to healthy plant tissue.

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