Viola cornuta Four Seasons F1 – White Cottony Spots

$10

Bonide Captain Jack's Copper Fungicide 32 oz

3 Use a cotton swab dipped in isopropyl alcohol to manually remove visible mealybug clusters from leaf axils and tender growth.

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Powdery Mildew

This fungal disease manifests as white, powdery patches on leaf surfaces, often caused by high humidity or poor air circulation around the Viola foliage. It can eventually lead to yellowing and stunted growth in the Four Seasons series.

Very Common

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How to confirm: Check if the white spots look like a fine dusting of flour that can be partially rubbed off with your finger.

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shopping_cart Recommended Products

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

Fiskars 5/8" Bypass Pruning Shears

2 Improve air circulation around the Viola foliage and reduce humidity by spacing plants further apart and avoiding overhead watering.

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

Cutting Tools

$13

Bonide Captain Jack's Copper Fungicide 32 oz

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Cottony Blotch (Botrytis cinerea)

In damp conditions, Botrytis can cause grayish-white fuzzy patches on the petals or leaves of Violas. This is a common necrotrophic pathogen that thrives in the cool, moist environments preferred by Viola cornuta.

Common

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How to confirm: Look for underlying brown, decaying tissue beneath the white fuzzy growth on the flower petals.

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shopping_cart Recommended Products

1 Remove and discard all heavily affected leaves and petals to prevent the fungus from spreading to healthy tissue.

2 Apply an organic fungicide to control the spread of the pathogen and protect remaining healthy foliage.

Flora Premium Plant Mister

3 Improve air circulation around the plant and reduce overhead watering to ensure the foliage dries quickly after moisture exposure.

Spray Bottles

Bonide Captain Jack's Copper Fungicide 32 oz

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White Mold (Sclerotinia)

While less common as a surface spot, Sclerotinia produces a white, cottony mycelium that can envelop stems and leaves. It is particularly devastating in dense plantings where moisture is trapped against the plant base.

Common

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How to confirm: Examine the stem bases for white fungal mass and small, hard black structures called sclerotia.

build How to fix it

shopping_cart Recommended Products

1 Remove and destroy all heavily infected plant material and surrounding debris to prevent the spread of fungal mycelium.

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