Kalanchoe Passion Acheron White Cottony Spots - Causes & Fixes

Jump to cause: Mealybugs Powdery Mildew Cottony Blight (Botrytis)

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Mealybugs

These small, soft-bodied insects produce a white, waxy, cottony secretion to protect themselves and the plant. In Kalanchoe species, they often cluster in the crevices between leaves and near the stem junctions.

Very Common

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How to confirm: Use a magnifying glass or toothpick to check if the white spots move or are attached to the leaf axils.

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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 to kill the insects and their waxy secretions.

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3 Use a cotton swab dipped in isopropyl alcohol to manually remove visible white cottony clusters from leaf crevices and stem junctions.

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Powdery Mildew

This fungal pathogen manifests as a white, flour-like coating on the leaf surfaces. High humidity and poor air circulation around the thick Kalanchoe foliage can trigger outbreaks.

Common

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How to confirm: Check if the white spots can be wiped off easily with your finger and if they appear more like a film than distinct clumps.

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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

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2 Improve air circulation around the foliage and reduce humidity by avoiding overhead watering and ensuring the plant is not crowded.

3 Prune and dispose of heavily infected leaves to reduce the fungal load on the plant.

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Cottony Blight (Botrytis)

While less common in succulents, extreme moisture on the fleshy leaves of Kalanchoe can lead to fungal growth that looks fuzzy or greyish-white. This usually accompanies signs of decaying plant tissue.

Common

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How to confirm: Inspect the base of the white spots for any signs of soft, brown, or mushy leaf tissue.

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1 Prune away any leaves or stems showing fuzzy white growth and dispose of them immediately to prevent the fungus from spreading.

2 Improve air circulation around the plant and ensure you are not watering the foliage, as moisture on leaves promotes Botrytis growth.

3 Apply an organic fungicide to protect the remaining healthy tissue from further fungal infection.

Bonide Captain Jack's Copper Fungicide 32 oz

0.9 L • 1 pcs • Organic

$12

In Stock