Where do fruit flies ever come from???

i threw away a rotten apple in my trash basket in my room, two days passed and i forgot about it and since the basket was filled with papers on top but i noticed it was infested with fruit flies all over flying in and out. the thing is, since its getting too cold here in florence, all the doors and windows of the house have been closed all of these two days, no flies, no mosquitos (as they usually come during this period). so where on earth did the fruit flies come from?? and being so incredibly tiny how do they ever fly into the house in the search for rotten fruits??





im starting to think, do they hatch and grow from the rotten part of the fruit??

Where do fruit flies ever come from???
Yes, they do hatch and grow in the rotten fruit. The most common fruit fly spends about 4 days as larva inside the fruit (feeding on the microorganisms that decompose the fruit, as well as on the sugar of the fruit themselves), after which they encapsulate and undergo a four-day-long metamorphosis. So probably a fruit fly came from outdoors and laid its eggs into your apple about 8 days before its descendants appeared in your trash bin. If you bought the apple 6 days before, then the eggs were laid before that.





Those times vary depending on your room temperature. For the common fruit fly, the shortest development time (egg to adult) is 7 days, and it is achieved at 28 °C (82 F). At 18 °C (64 F) it takes 19 days.





And oh yes, those little buggers can sniff the ripe fruits inside buildings and come looking for them. It only takes one to lay 100 - 1000 eggs, and there you go... a happy little farm of fruit flies.
Reply:I have washed nectarines and put them in a sealed container. Within


hours fruit flies appeared. Report It

Reply:Perhaps the fruit already had eggs and they hatched. Certainly not spontaneous generation. The eggs had to have come from somewhere.
Reply:Time flies like an arrow.


Fruit flies like a banana.
Reply:Some small insects survive in the warmth of indoors and lay their eggs in food left out.



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