2. If you think yam is only moldy at both ends and can still be eaten, remember to remove the moldy ends and leave the middle part to eat. Yam is moldy at both ends. If you want to eat it, you must cut off the rotten part, that is, the moldy two ends of the yam, and also cut off a part near the rotten place. All right.
3. Then observe whether the middle part of yam is infected by mold and turns blue-green. If it is normal, it can be eaten. Soak in water for 30-60 minutes before eating, so that the residual toxin can be dissolved in water, and then cook, and add vinegar when cooking to make it non-toxic.