fungal, viral or bacterial infection of the potato tuber. dark spots inside the potato. peeled raw potato with spots

potatoes peeling tuber rot disease horticulture scab fungal hand kitchen quality stains uncooked late blight alternaria peel peeled fusarium rhizoctonia affected area pruning fungi food fungus blotch spots dark grey fingers bacterial loss fight health natural nongmo farming farmhouse product safety viral infection potato inside raw woman danger farm