What seems to be happening is that bands of cells within each potato tuber are having their starch converted into sugar, and that the sugar caramelises when the tuber is cooked.

• 看起来，感染这种病后，多条土豆块茎细胞带受到影响，这些细胞的淀粉转化成糖，烹饪时，这些糖就会焦化。