Final diagnosis

Mechanical damage on tubers

$Bruises (fracture damage) caused by major impacts during harvesting or handling of potato tubers$

$Bruises (fracture damage) caused by major impacts during harvesting or handling of potato tubers$

Scratches and brown marks on immature potato tuber

Abrasions and browning playing in rusty brown color areas on potato tubers

Internal bruising or black spots under the skin, caused by a reaction to wounds, chiefly when handling cold potato tubers

Crushing of a potato tuber with the formation of small piles of starch