Rhododendron alabamense White Cottony Spots - Causes & Fixes

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Mealybugs

These small insects secrete a white, waxy, cottony substance to protect themselves while feeding on the sap of the Alabama Azalea. They often congregate near stem nodes and leaf axils, causing leaves to yellow or drop.

Very Common

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How to confirm: Use a magnifying glass to look for tiny, crawling insects underneath the cottony mass on the stems.

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1 Isolate the plant immediately to prevent the mealybugs from spreading to your other greenery.

2 Apply an organic insecticide spray to the affected areas to eliminate the insects and their protective waxy coating.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

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3 Gently wipe away visible cottony clusters from stems and leaf axils using a cotton swab dipped in isopropyl alcohol.

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Cottony Scale

Scale insects produce a white, felt-like coating that can resemble cotton patches on the foliage and woody stems. As they feed on the plant's vascular system, they can weaken the Alabama Azalea and lead to dieback.

Very Common

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How to confirm: Gently scrape away the white fluff with a fingernail to see if a hard, shell-like insect is underneath.

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shopping_cart Recommended Products

1 Apply an organic insecticide spray to the affected stems and foliage to eliminate the scale insects and their protective white coating.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Manually remove visible cottony clusters from the woody stems using a soft cloth or cotton swab dipped in rubbing alcohol to reduce the infestation size.

3 Monitor the plant's vigor and apply a balanced fertilizer to help the azalea recover from the nutrient loss caused by the scale feeding.

FoxFarm Grow Big Liquid Plant Food 1 Quart

0.9 L • 1 pcs

$30

In Stock

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Azalea Powdery Mildew

While typically appearing as a fine dusty coating, severe infections of Botrytis or powdery mildew can sometimes present as fuzzy, white patches on the surface of the leaves.

Common

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How to confirm: Check if the white spots are strictly on the leaf surface and if they spread rapidly during high humidity.

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shopping_cart Recommended Products

1 Apply an organic fungicide to the affected leaves to control the spread of the powdery mildew and prevent further fungal growth.