One of the first signs that tubers are not edible anymore is their discoloration. Their flesh becomes white, orange, yellowish, or purple while the skin gets white, yellowish, brown, purple, red, or even black color.
How long does it take for Yam to go bad?
YAMS - FRESH, RAW Properly stored, raw yams will last for about 5 to 7 days at normal room temperature. To maximize the shelf life of yams, store in a cool (45-55° F; warmer than the refrigerator, but colder than normal room temperature) dark area; under those storage conditions, yams will last about 1 month.
How can you tell if a sweet potato is off?
Some common traits of bad sweet potatoes are discoloration and growths through the skin. They will begin to get soft and wet (water will leak out) and then turn brown and/or black. If part of the sweet potato goes bad, the whole potato should be thrown out as the flavor is affected.
How can you tell if yams are good?
To select healthy yams, pick yams that are firm to touch all the way around and have very small to no cracks. While yam skin is highly textured, it shouldn't be wrinkled like an old cucumber. These tips are generally helpful but note that at different stages of life, the taste of the yam changes.
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