We Get Questions
Our cactus of 12 years is dying, I dont know the type of cactus so I have taken some pictures of it so you can help. I wanted to see if I could get your opinion before i started cutting it up it has grown to over 5′ and we would hate to cut it up if we dont have to.
All the best
From your photos, it looks like your Euphorbia trigona it has a very bad sunburn. Did it recently get moved or turned so it faces a new direction? That is the usual cause of skin bleaching. If not then it most likely has a bad fungus infection and you can try curing it by spraying with a 1% Neem Oil solution. However the scar tissue will remain and will eventually turn to “bark”.
Sorry I can’t give you better news.