Savoy Cabbage Sonho F1 White Cottony Spots - Causes & Fixes

Jump to cause: Powdery Mildew Mealybug Infestation Sclerotinia (White Mold)

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Powdery Mildew

This fungal disease manifests as white, flour-like patches on the surface of cabbage leaves. It thrives in high humidity and moderate temperatures, common in Savoy varieties with their textured leaf structure.

Very Common

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How to confirm: Inspect the undersides of the leaves to see if the white patches are spreading across the leaf veins.

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1 Apply an organic fungicide to the affected leaves to stop the spread of the fungal spores.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

2 Prune and remove any heavily infected leaves immediately, ensuring you dispose of them away from your garden to prevent further contamination.

3 Improve air circulation around your cabbage plants and avoid overhead watering to reduce the humidity that fuels mildew growth.

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Mealybug Infestation

Mealybugs are small insects covered in a white, waxy, cottony substance that looks like spots on the plant. They suck sap from the cabbage leaves, often causing yellowing or stunted growth.

Common

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How to confirm: Use a magnifying glass to check if the white spots move or if you can find tiny insects nestled in leaf axils.

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1 Isolate the cabbage from other plants and use a soft cloth or cotton swab dipped in rubbing alcohol to manually remove the visible white cottony mealybugs.

2 Apply an organic insecticide spray to the plant to eliminate remaining insects and prevent further infestation.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

3 Monitor the soil moisture levels to ensure the plant is not overly stressed, as stressed plants are more susceptible to pests.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

In Stock

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Sclerotinia (White Mold)

This soil-borne pathogen produces a white, cottony fungal growth that can envelop the base of the cabbage head and leaves. It typically leads to rapid tissue decay and wilting.

Common

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How to confirm: Check the base of the stem for any signs of browning or mushy texture beneath the white fuzz.

build How to fix it

shopping_cart Recommended Products

1 Remove and destroy all infected plant material and surrounding debris to prevent the fungal spores from spreading to healthy cabbage plants.

2 Apply an organic fungicide to the affected area to control the spread of the white mold.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

3 Improve soil drainage and airflow around the base of the cabbage by adding horticultural perlite to the growing medium.