Too late. Once rot takes a foothold, its a goner.

"richard" wrote in message
...
My biggest columnar cactus is rotting from the top due I think to bringing
it indoors last winter to the wrong conditions. It was about 18 inches
tall. I've cut of the top, applied white spirit to clean and rooting
hormone for the anti-fungicide it contains but to my dismay it has
continued
to rot. Till now it has been a very fast grower. Any lifesaving
suggestions
gratefully appreciated.