Red Cabbage Pretino F1 – White Cottony Spots

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

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Powdery Mildew

While more common in cucurbits, certain strains can affect brassicas, presenting as white, flour-like patches on the surface of the leaves. It thrives in environments with high humidity and moderate temperatures.

Common

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How to confirm: Observe if the white spots can be easily rubbed off with your finger without significant tissue decay.

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1 Apply an organic fungicide to the affected leaves to control the spread of the powdery mildew spores.

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2 Improve air circulation around the cabbage plants and reduce humidity by avoiding overhead watering.

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

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Mealybugs or Cottony Scale

These sap-sucking insects secrete a waxy, white substance that looks like cotton to protect themselves. They feed on the cabbage leaves, often causing yellowing (chlorosis) around the infestation sites.

Common

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How to confirm: Use a magnifying glass to look for small, moving insects underneath the white cottony masses.

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1 Isolate the plant immediately to prevent the spread of mealybugs to other greenery and treat the visible white spots with an organic insecticide spray.

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2 Use a cotton swab dipped in isopropyl alcohol to manually remove individual insect clusters from the leaves and stems.

3 Monitor soil moisture levels closely, as stressed plants are more susceptible to infestations; use a moisture meter to ensure the soil remains consistently damp but not waterlogged.

Water Meters

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Botrytis cinerea (Gray Mold)

In early stages, Botrytis can appear as light-colored, fuzzy patches on cabbage foliage. As it progresses, it typically turns into a more grayish, spore-heavy mass that causes rot in the head.

Common

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How to confirm: Inspect the tightly packed inner leaves of the cabbage head for signs of moisture and decay.

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1 Remove and destroy all infected cabbage leaves and any decaying plant matter to prevent fungal spores from spreading to healthy tissue.

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