There are no flies in my house, but if I leave a piece of fruit out too long, they show up. Even if it’s far away from any doors or windows, they’ll be there. So, where do they come from?
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So this is just google now. You are violating rule 7 of this sub. Even if you just search this sub that exact question has been asked and answered many times.
“Fruit flies come from a variety of sources, including:
Infested produce
Fruit flies can lay eggs inside produce from the grocery store or farmer’s market.
Openings
Fruit flies can fly into your home through open windows and doors, or through cracks in walls and loose seals.
Fermenting material
Fruit flies can breed in moist, fermenting material found in drains, garbage disposals, empty bottles and cans, trash containers, mops, and cleaning rags.
Outside
Fruit flies can smell rotting fruit from miles away and are attracted to temperate climates with lots of water.
Spills and crumbs
Fruit flies can breed on crumbs and spills that go unnoticed.
Fruit flies can seem to appear out of nowhere because they breed and develop quickly. A single fruit fly can live for about 50 days and lay around 50 eggs per day. If left unchecked, an infestation can quickly grow out of control”
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