Name: Noel Calvert Tumaco, Colombia-South America (Zone 13b) A gringo?Where?(does a doubletake)
I would force it dormant first, & treat it with a fungus control method. There is a copper sulfate compound used to control fungus in fish tanks. I would try that before replanting the tuber. Bleaching the tuber itself would kill it I think.
Kneel & swear fealty to the Lord Dragon, or you will be knelt! Mazrim Taim