Why does your Echinocereus engelmannii have white cottony spots? Diagnose the cause and fix it with our step-by-step guide.
These small insects secrete a white, waxy filament to protect themselves, which looks like tufts of cotton nestled in the areoles or near the base of the cactus. They suck the sap from the Engelmann's Hedgehog Cactus, potentially causing localized tissue collapse.
While scale often appears as hard bumps, certain species can produce a fuzzy or cottony appearance during their mobile stages. They attach to the cactus epidermis and drain nutrients, leading to stunted growth in the stem.
If the white spots are accompanied by soft, mushy tissue, it may be fungal mycelium emerging from an area of rot. This often occurs in Echinocereus when the substrate retains too much moisture, leading to anaerobic conditions.
English
Italiano
