A number of fungi and bacteria are capable of causing decay in potato tubers. Symptoms are often present at lifting, but some of the problems will also spread through stored tubers, and a few will only develop after prolonged storage. Black leg (Pectobacterium atrosepticum) on potato 'Charlotte'.
What causes a potato to rot?
Introduction. Soft rot of potatoes has been caused by a range of bacteria around the world such as Pectobacterium carotovorum subspecies carotovorum, Pectobacterium atrosepticum and Dickeya species. Previously, these bacteria belonged to the genus Erwinia.
How long does it take a potato to rot?
Potatoes can last for up to several months in a cool pantry. If stored at room temperature, they are best if eaten within one to two weeks. Once cooked, keep them in the fridge for no more than three days.
How do you know when potatoes are rotting?
Some signs that uncooked potatoes have spoiled include dark spots on the skin, a soft or mushy texture, and foul odor. Cooked potatoes may have mold but can also spoil without any noticeable signs.
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