Sedum makinoi White Cottony Spots - Causes & Fixes

Jump to cause: Mealybugs Powdery Mildew Cottony Scale

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Mealybugs

These small, soft-bodied insects secrete a white, waxy, cotton-like substance to protect themselves. They cluster in the tight crevices between the fleshy leaves of Sedum makinoi, sucking the sap and weakening the plant.

Very Common

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How to confirm: Use a magnifying glass to check for tiny moving white insects tucked near the leaf bases or stems.

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

2 Treat the infestation by spraying the plant with an organic insecticide or neem oil to kill the insects and remove the 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 the crevices of the leaves.

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Powdery Mildew

This fungal disease manifests as a white, flour-like coating on the leaf surfaces. It thrives in high humidity and poor air circulation, which can occur if the dense foliage of Gold Stonecrop is crowded.

Common

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How to confirm: Check if the white spots look more like a surface dust that can be partially wiped away with your finger.

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

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock

2 Improve air circulation around the plant by thinning out dense foliage and ensuring the plant is not crowded by others.

3 Reduce humidity levels by avoiding overhead watering and ensuring the soil surface dries between waterings.

GROWIT Soil Moisture Meter SMM-V3

Water Meters

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Cottony Scale

Certain species of scale insects produce white, filamentous secretions that mimic cotton. They attach themselves firmly to the succulent stems and leaves, often causing the plant to lose its golden luster.

Common

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How to confirm: Inspect the stems for small, immobile bumps beneath the white fuzz that do not move when prodded.

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shopping_cart Recommended Products

1 Treat the plant with an organic insecticide spray to eliminate the scale insects and their white secretions.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Carefully wipe the stems and leaves with a cotton swab dipped in isopropyl alcohol to physically remove visible scale insects.

3 Prune away any heavily infested or dead stems to prevent the spread of the pests to healthy parts of the plant.