Sedum rubrotinctum White Cottony Spots - Causes & Fixes

search Possible Causes

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Mealybug Infestation

Mealybugs are small, soft-bodied insects that secrete a white, waxy, cotton-like substance to protect themselves. They congregate in the crevices of the fleshy 'jelly bean' leaves and stems to suck sap from the Sedum.

Very Common

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How to confirm: Use a cotton swab dipped in rubbing alcohol to dab the white spots; if they dissolve and turn brown, it is likely mealybugs.

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1 Isolate the plant immediately from other greenery 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

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3 Use yellow sticky traps near the plant to capture any flying adult insects and monitor for new arrivals.

Super Ninja Fungus Gnat Traps - 30 Pack

30 pcs

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Cottony Scale

Similar to mealybugs, scale insects can produce a white, fluffy coating. These pests attach themselves to the stem of the Sedum and feed on the plant's vascular system, often causing leaves to lose their red tint.

Common

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How to confirm: Look for small, brownish bumps underneath the white fluff that appear firmly attached to the plant tissue.

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shopping_cart Recommended Products

1 Isolate the plant immediately to prevent the spread of scale insects to other greenery and treat the visible white spots with an organic insecticide spray.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

2 Use a cotton swab dipped in isopropyl alcohol to manually remove the cottony scale from the stems to stop them from feeding on the plant's vascular system.

3 Monitor the soil moisture levels to ensure the plant is not overly wet, as high humidity can encourage pest's survival.

GROWIT Soil Moisture Meter - Blue

Water Meters

$12

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Botrytis Blight (Gray Mold)

In conditions of high humidity and poor airflow, Botrytis can manifest as fuzzy, light-colored patches. While more common in damp environments, it can target the decaying tissue of a Sedum leaf.

Common

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How to confirm: Check if the white spots are accompanied by soft, mushy, or rotting leaf tissue.

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shopping_cart Recommended Products

1 Prune and remove all affected leaves or stems showing white fuzzy patches to prevent the mold from spreading to healthy tissue.

2 Apply an organic fungicide to the plant to control the fungal growth and protect remaining healthy leaves.

Bonide Captain Jack's Neem Oil 32 oz

0.9 L • 1 pcs • Organic

$10

In Stock

3 Improve air circulation around the plant and reduce humidity by ensuring the soil dries out between waterings; use a moisture meter to monitor soil levels.