My Basjoo is looking better and i just got myself a musa sikkimensis

i wanted to know for sure that what im seeing is rot and what i should do? it had dried stem leaves so i took them off and saw this. Thanks everyone for your help!
Musa Sikkimensis Photo by Nazsen | Photobucket
IMG_0644_zpscbec1411.jpg Photo by Nazsen | Photobucket
Musa Sikkimensis Photo by Nazsen | Photobucket