EverydayRoots notes that one way to kill fruit flies is to create an apple cider vinegar trap. Add 1/2 cup heated apple cider vinegar and a couple drops of dish soap to a mason jar, and place a rolled up and taped piece of paper inside, which helps trap and kill the flies that come for the cider.Continue Reading
Another type of trap can be made that uses fruit as the bait for the fly. Place overly ripe fruit at the bottom a jar, and cover it with plastic wrap. Poke a few holes in the wrap with toothpicks, and place the jar wherever the fruit flies have been gathering. As with the vinegar trap, flies are tempted inside and then do not know how to get out. After enough flies are inside, place the entire jar in a bucket of soapy water for at least 10 minutes to ensure the flies all drown.
One very easy trap involves leftover wine. Fruit flies are drawn to red wine, so leaving just a little in a bottle in areas in which they gather draws them to the wine and causes them to drown. If not using the wine's own bottle, wine can be placed in a separate container and covered with plastic wrap with holes poked in it.Learn more about Pest Control