This brings attention to the fact that growers constantly battle numerous and constant adverse elements from insects, weather, plant diseases, and much more. Despite taking proactive steps to minimize crop threats, such adverse elements remain ever-present. Idaho growers and shippers are vigilant at every stage and make every effort to cull potatoes that do not meet our high-quality standards, far exceeding even what USDA requires.

Here is a link that touches upon a closely related question: https://idahopotato.com/dr-potato/can-i-eat-potatoes-with-black-spots