Pisum sativum White Cottony Spots - Causes & Fixes

Jump to cause: Powdery Mildew (Podosphaera vulgata) Sclerotinia sclerotiorum (White Mold) Cottony Aphid Colonies

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Powdery Mildew (Podosphaera vulgata)

This is the most common cause of white, flour-like patches on pea leaves. The fungus thrives in humid conditions with dry leaf surfaces, colonizing the host tissue and reducing photosynthetic capacity.

Very Common

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How to confirm: Inspect the undersides of leaves for small white spores that can be easily rubbed off with a finger.

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

3 Improve air circulation around the plants and avoid overhead watering to keep leaf surfaces dry.

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Sclerotinia sclerotiorum (White Mold)

This soil-borne pathogen produces white, cottony mycelium that rapidly spreads across pea stems and pods. It can cause the entire plant to collapse and turn into a mass of white fuzz.

Common

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How to confirm: Check the base of the stem for firm, black, coal-like structures called sclerotia embedded in the white fungus.

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1 Immediately remove and destroy all infected plant material and surrounding debris to prevent the spread of fungal spores.

2 Apply an organic fungicide to the remaining healthy plants 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 air circulation and reduce soil moisture by avoiding overhead watering and ensuring well-draining soil.

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Cottony Aphid Colonies

Certain aphid species or high concentrations of aphids can produce a waxy, white appearance on new pea shoots. Their feeding causes leaf curling and potential secondary fungal growth.

Common

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How to confirm: Look for tiny, moving insects underneath the leaves or near the tender growing tips of the pea vines.

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shopping_cart Recommended Products

1 Apply an organic insecticide spray to eliminate the aphid colonies and prevent further feeding damage to the pea shoots.