Zantedeschia Captain Beretta White Powder - Causes & Fixes

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Powdery Mildew

This fungal disease, caused by Oomycetes or Ascomycetes, thrives in high humidity and stagnant air around the large leaves of Calla Lilies. It manifests as a white, flour-like coating on the leaf surfaces which can eventually lead to foliage necrosis.

Very Common

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How to confirm: Check if the white patches are superficial and can be wiped off with your finger, leaving a clean spot underneath.

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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

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2 Improve air circulation around the plant by pruning heavily infected leaves and ensuring the plant is not in a crowded area with stagnant air.

3 Reduce humidity levels around the foliage and avoid overhead watering, which can spread spores to healthy leaves.

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Mealybugs

These small insects secrete a white, waxy, cottony substance to protect themselves as they feed on the sap of the Zantedeschia. Infestations often appear in the crevices where the leaf stalks meet the rhizome.

Common

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How to confirm: Use a magnifying glass to look for tiny, moving insects nestled at the base of the leaves or stems.

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1 Isolate the plant immediately to prevent the mealybugs from spreading to other greenery in your collection.

2 Apply an organic insecticide spray to the affected areas, ensuring you coat the crevices where the white waxy substance is visible.

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 larger clusters of mealybugs from the leaf stalks and rhizome.

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Mineral Deposits (Hard Water)

If you are misting the large leaves of 'Captain Beretta' with tap water, calcium and magnesium carbonates can leave white, crusty residue behind as the water evaporates.

Common

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How to confirm: Examine if the white spots feel hard or crunchy to the touch rather than soft or fuzzy.

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1 Stop misting the leaves with tap water to prevent further mineral buildup on the foliage.

2 Gently wipe the leaves with a soft, damp cloth using distilled or filtered water to remove existing white deposits.