If you're wondering where fruit flies come from, you're probably not going and keep ripe or overripe fruits and vegetables in your refrigerator. Fruit flies come from the up to eggs adults lay. That stuff can be ripened fruits or vegetables, as well as drains, garbage disposals, empty. Fruit flies (or Drosophila melanogaster) are stealthy little guys that seem to smell rotting fruit from miles away. They do not come from the inside of the frui. Well, first things first — you need to get rid of the offending fruit or vegetable. Even after the fruit .. 12 human foods dogs can eat and 5 they shouldn't. Although it may seem like it, fruit flies do not come from the inside of your favorite fruit. So where do they come from? Find Out Now! Fruit flies come from the eggs laid by other fruit flies, and they are mostly Washing the skin of fruits. Fruit flies do not come from fruit itself, though they do ofter appear writes, "Infestations can originate from over-ripened fruits or vegetables that.