HELP!!! My cacti are dying!

[AndInTheEnd12345]

Hey guys, have been reading for years but haven't posted enough to be able to post this anywhere else on the forum. Any posts I did have, I irrationally deleted one night when thinking too hard about the NSA. Anyway....

3 of my 6 Bridgesii cacti have this light brown patching that is spreading fast. I can't identify it anywhere on the net, so I turn to you for help. Please let me know if you know the source of the problem and how I may be able to fix it. Thank you!

 

[AndInTheEnd12345]

If someone would be nice enough to post this to the cactus cultivation thread, I would be very appreciative... Think of the poor cacti

 

[cosmictaylor]

Dang looks like a fungus, try spraying with neem or some fungicide. idk good luck bro

 

[dg]

beter pics might help...

the first one looks like a goner, sorry

dry them out, get them in a dry space, dust with sulfur and hope for the best

 

[wearepeople]

beter pics might help...

 

[xram]

Don't use neem, that will only make it worse, whatever it is - cacti don't like oil-based sprays. Sulfur-based funigicide and a warm, dry place would be my first move.