This type of rot spreads through the tuber with tremendous speed and is usually detected too late. The same holds for occasional bacterial infections. These are recognized by the flesh of the tuber turning into a slimy substance. Cut away the bad parts and treat the scars with a bactericide. When the scar becomes dry, seal off with Topsin.
Prevention is the rule in controlling pests in Amorphophallus.
It is therefore recommended that tubers always be inspected for pests after the growing season. Be sure to put tubers of Group II species back in the soil after examination.