Many cactii, especially Opuntia and agave, are becoming increasingly susceptible to fungus in taking them out and killing the plants, before their owners even know it. Odds are, if you see fungus on your cactus, the damage has already been done. There isn’t much to save the plant at this point. This emphasizes exactly how important it is to find warning signs of fungus on cactii before it gets this far. If you see fungal lesions, it is best to cut them off.
- Some fungal problems are merely aesthetic while others can be fatal to the plant
- Wind and splashing water are just two of the many ways fungal spores can travel.
- One way to deal with a fungal infection on a cactus is to take a cutting from an uninfected part of the cactus and start a new plant
“Another way to save a plant is to cut out the infected tissue. This doesn’t work with all fungi, but it may be effective at times.”
Read more: https://www.gardeningknowhow.com/ornamental/cacti-succulents/scgen/fungal-lesions-on-cactus.htm