Geranium pratense White Cottony Spots - Causes & Fixes

Jump to cause: Powdery Mildew (Podosphaera উদ্ভিদ species) Mealybug Infestation Cottony Scale

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Powdery Mildew (Podosphaera উদ্ভিদ species)

This is the most common cause of white, flour-like spots on Geranium pratense leaves. The fungus thrives in humid conditions with poor air circulation and can spread rapidly through the foliage.

Very Common

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How to confirm: Check if the white patches feel dusty and can be rubbed off easily with your finger.

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1 Apply an organic fungicide to eliminate the existing fungal spores and prevent further spread across the foliage.

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 reduce the fungal load and improve airflow around the plant.

3 Increase air circulation around the plant and avoid overhead watering to keep the foliage dry, as moisture promotes mildew growth.

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Mealybug Infestation

Mealybugs are small insects that secrete a white, waxy, cottony substance to protect themselves. They cluster in the axils of the leaves and stems of cranesbill plants, sucking plant sap.

Common

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How to confirm: Inspect the underside of the leaves and stem joints for tiny, moving insects covered in white fluff.

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1 Isolate the plant immediately to prevent the mealybugs from spreading to your 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 Use a cotton swab dipped in isopropyl alcohol to manually remove visible white cottony clusters from leaf axils and stems.

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Cottony Scale

Certain scale insect species produce a thick, white, cotton-like coating over their bodies. These pests can cause yellowing and stunted growth in meadow cranesbill plants.

Common

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How to confirm: Look for small bumps on the stems that are encased in a white, felt-like material.

build How to fix it

shopping_cart Recommended Products

1 Apply an organic insecticide spray to the plant to eliminate the cottony scale insects and their eggs.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Manually remove visible white cottony clusters from the stems and leaves using a cotton swab dipped in rubbing alcohol.

3 Monitor the plant's moisture levels to ensure the soil is not overly damp, as excess moisture can encourage pest's thrive.