Why does your Euphorbia oncoclada have white cottony spots? Diagnose the cause and fix it with our step-by-step guide.
This is the most frequent cause of white, cottony masses on Euphorbia species. The insects secrete a waxy, white substance to protect themselves while they suck the sap from the succulent stems and roots.
Certain scale insects produce thick, white, felt-like coverings that can mimic cotton. On oncoclada, these often appear in the crevices between stem segments or near the base of the plant.
Fungal pathogens like Sclerotinia can produce white, mycelium-like growth on the surface of succulent stems, especially in high humidity or poorly draining substrate.
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