Chrysanthemum Borilli White Powder - Causes & Fixes

Jump to cause: Powdery Mildew (Podosphaera xanthii) Mealybugs Whiteflies

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Powdery Mildew (Podosphaera xanthii)

This is the most common cause of white, flour-like patches on Chrysanthemum leaves. The fungus thrives in high humidity and stagnant air, colonizing the leaf surface and potentially causing leaves to curl or drop.

Very Common

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How to confirm: Look for a dusty, white coating that can be rubbed off with your finger but reappears on new growth.

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

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2 Improve air circulation around the plant and reduce humidity by avoiding overhead watering, which helps prevent the fungus from thriving.

3 Prune and carefully dispose of heavily infected leaves to reduce the fungal load on the plant.

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Mealybugs

Small, white, waxy insects that resemble bits of cotton or powder. They congregate in the leaf axils and undersides of 'Borilli' blooms, sucking sap and secreting honeydew.

Common

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How to confirm: Inspect the crevices of the stems for small, slow-moving white bumps that feel slightly fuzzy.

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

Bonide Captain Jack's Neem Oil 32 oz

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2 Manually remove visible white waxy clusters using a cotton swab dipped in isopropyl alcohol to prevent further sap loss.

3 Inspect the undersides of leaves and leaf axils regularly to catch new infestations before they spread.

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Whiteflies

Tiny white insects that inhabit the undersides of leaves. While they don't look like powder themselves, their presence and the honeydew they leave behind can lead to secondary fungal growth or a 'dusty' appearance.

Common

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How to confirm: Gently shake a branch of the plant to see if a cloud of tiny white insects flutters away.

build How to fix it

shopping_cart Recommended Products

1 Apply an organic insecticide to eliminate the whitefly population and control any secondary fungal growth.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Use yellow sticky traps to capture adult whiteflies and monitor the infestation levels.