Why does your Dieffenbachia Big Ben have white cottony spots? Diagnose the cause and fix it with our step-by-step guide.
These small, sap-sucking insects secrete a white, waxy, cottony substance to protect themselves as they colonize the nodes and leaf axils of your Dieffenbachia. They weaken the plant by draining nutrients directly from the stem and leaves.
Similar to mealybugs, these pests create white, felt-like patches on the surface of the leaves and stems. They can cause yellowing and stunted growth in Dieffenbachia by interfering with the plant's vascular system.
In high-humidity environments, certain fungal pathogens can manifest as white, fuzzy mycelium on decaying plant tissue. This often occurs if the Dieffenbachia's base or leaf petiole is experiencing moisture-related decay.
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