Why does your Astrophytum asterias have white cottony spots? Diagnose the cause and fix it with our step-by-step guide.
These small, white, insect pests secrete a waxy, cottony substance to protect themselves as they feed on the cactus sap. They often congregate in the crevices between the scales of the Astrophytum asterias body.
While often more plate-like than cottony, certain types of scale can produce white, fuzzy secretions that mimic cotton. They attach firmly to the stem and drain nutrients from the Star Cactus.
In cases of high humidity or poor airflow, certain fungal pathogens can develop white, thread-like mycelium on the surface of the cactus. This is often a precursor to rot in Astrophytum species.
English
Italiano
