Chrysanthemum Coutinho White Powder - Causes & Fixes

Jump to cause: Powdery Mildew Mealybugs Botrytis Blight (Early Stage)

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Powdery Mildew

This is a fungal disease caused by Oomycetes that thrives in high humidity and moderate temperatures. It manifests as characteristic white, flour-like spots on the leaves and buds of Chrysanthemums.

Very Common

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How to confirm: Inspect the undersides of leaves for fuzzy white patches that can be wiped off with your finger.

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

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

2 Prune and dispose of heavily infected leaves and stems to reduce the fungal load in the plant area.

3 Improve air circulation around the plant and reduce humidity by avoiding overhead watering.

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Mealybugs

These small insects secrete a white, waxy, cottony substance to protect themselves. While they look like powder or fuzz, they are mobile pests that cluster near nodes and leaf axils.

Common

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How to confirm: Use a magnifying glass to check if the white spots move or are attached to stems and leaf junctions.

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

2 Treat the infestation by spraying the plant with an organic insecticide to eliminate the insects and their waxy coating.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

3 Wipe away visible white clusters from leaf axils and stems using a cotton swab dipped in isopropyl alcohol.

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Botrytis Blight (Early Stage)

In humid conditions, Botrytis can cause greyish-white fuzzy patches on chrysanthemum blooms and foliage. It often starts as a pale discoloration before turning into a dark, necrotic rot.

Common

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How to confirm: Check if the white powder is accompanied by soft, decaying brownish tissue on the flower heads.

build How to fix it

shopping_cart Recommended Products

1 Remove and discard all affected blooms and foliage immediately to prevent the fungal spores from spreading to healthy parts of the plant.

2 Apply an organic fungicide to protect the remaining healthy tissue and control the spread of the blight.

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 humidity by avoiding overhead watering, which keeps the foliage dry.