When we arrived back home in Raleigh, NC from our July 4th vacation, we were greeted with hundreds of Fruit Flies in our kitchen. After a short investigation we realized that we had left some overripe bananas in our fruit basket while we were gone. The fruit flies were everywhere in the kitchen and buzzing around us while we were unpacking. So I decided to try a little experiment.
We made two fruit fly “traps” by taking two glasses, filling one with red wine and one with apple cider vinegar, and then covering with plastic wrap. Then I took a pencil and poked small holes (just large enough for the fruit fly to enter). Within minutes the fruit flies were buzzing around the glasses, within the hour many fruit flies were getting trapped inside them.
From this last picture you can see by the morning that many of the flies have been trapped and we no longer are seeing many of these nuisance pests. After our “experiment," we also discovered that the red wine should be saved for your guests and the apple cider vinegar was by far the best “bait" to use when hunting fruit flies. (Note that the female fruit fly can lay up to 500 eggs and removal of the food source is a must when trying to control these pests).
Fruit flies go through a full metamorphosis during their lives. The females typically with lay their eggs (up to 500) in moist, organic materials or on the food source itself (think plants/soil/dirty disposals/drains etc.) These eggs “hatch” into larvae in about 24 hours and feed directly at the food source (decaying materials in fermenting foods). After feeding from 4-6 days the larvae pupate and within 4-6 more days hatch out into adults. And so the cycle repeats.