Expert: Eat sweet potato with black spots
Sweet potatoes are contaminated with Alternaria solani (a kind of mold) and cause dark brown patches on the surface. The toxins excreted by the black spot pathogens contain sweet potato ketone and sweet potato keto alcohol, which will make the sweet potato harder and bitter, and the resulting acute toxicity has a great impact on the human liver. The toxins cannot be destroyed using methods of cooking, steaming, and baking. Therefore, whether it is eaten raw or cooked sweet potato with black spot, can cause poisoning.
The symptoms of sweetpotato poisoning by mildew are stomach discomfort, nausea, loss of appetite, severe vomiting, dizziness, limb weakness, and numbness. The mortality rate can reach 16%.
There are two main ways to prevent black spot sweetpotato poisoning:
First, do not eat spoiled, hard, bitter sweet potato and mildewed dried sweet potato.
Second, the sweet potato skin should be dried before storing the sweet potatoes. The cellar should have a high topography, dryness, and no leakage, and the bedding should be clean. Sweet potatoes that are planted in low-lying areas or sweet potatoes that have been flooded should be eaten as soon as possible and should not be used as seeds.
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