Where do those annoying fruit flies come from?

SPONTANEOUS GENERATION!!!!!!

…Just kidding. :) (Science jokes: symptom of too much lab time!)

They come from the environment – their eggs are usually carried in on fruit you buy in the store (I know, ICK ICK). If you leave your fruit out long enough, the eggs hatch and they fly around your house looking for other fruit to eat. If you leave fruit for a looong time you see a huge boom of fruit flies because it gives them ample time to reproduce on that lovely food source you’ve left out for them. They really like mushy stuff like peaches and bananas, or anything rotten.

Try making a little trap for them, like putting apple cider vinegar with a drop of dish soap in a jar on the counter. They’ll fly in because it smells like rotting fruit, but they drown in the vinegar.

the green bananas you buy from the store to ripen into yellow banana for consumption does hold numerous fly eggs.

The eggs hatch the same time as the bananas ripen, hence you get new set of fruit flies everytime you bring home the green bananas.

To reduce, if not eliminate, these flies, hand or sponge wash your green bananas with dish soap and rinse with hot water as soon as you get home, then hang your bananas on a banana stand. Dispose of the plastic packaging outdoors right away.

Insects can be attracted from great distances and we only notice fruit flies in groups. They are not just on bananas. You can wash an apple thoroughly and place it on the counter. Within a week you will have fruit flies drawn by gasses released by ripening/

The life cycle of a fruit fly (from egg to adult) is around 10 days (ref) but it only spends about half of this time as a maggot (larva) & the other half as a pupa, similar to a small butterfly cocoon. Yuk !

Fortunately fruit flies don’t bite and don’t generally spread disease as some other flies do.

They come in the fruit and packages we get at the grocery.