| Hi
From the photo it looks cactus to me. If the plants was mine I would remove the lot from the pot.
Cut all dead back-bulbs off the dead plant side and try to save the new growth on the other side and repot into a fresh mix.
I always try to water in the morning and for some reason I can not water it waits until the morning I can.
I suspect the potting mix is long passed its use by date also, this can lead to root problems on new growth trying to get established
Best of luck
Ron |