Why does your Pachyphytum Dr Cornelius have white cottony spots? Diagnose the cause and fix it with our step-by-step guide.
Mealybugs are small, sap-sucking insects that produce a white, waxy, cottony secretion to protect themselves. On Pachyphytum, they often congregate in the tight crevices between leaves and at the base of the plant, causing localized swelling or leaf drop.
This fungal disease manifests as a white, flour-like coating on the leaf surfaces. While more common in humid environments, high moisture levels on the thick leaves of 'Dr Cornelius' can trigger fungal growth.
Some species of scale produce white, cottony masses (often called Cottony Scale) that attach to the succulent's stem. They drain nutrients from the plant, leading to a loss of the characteristic farina (powdery coating) on the leaves.
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