All you need is some sort of jar, here I'm using a pint jar, and in the bottom add a bit of some produce that you no longer need. I recommend using whatever it is that the fruit flies in your house love. In my house it's banana's, tomatoes and red wine. Then take a piece of paper and shape it into a funnel that will go almost to the bottom of the jar, not touching, and will fill the mouth of the jar. Make sure the point of the funnel is not a big hole but not too tiny either. The goal is to let the fruit flies in but not make it easy to get out. Tape the funnel enough to keep together. Then using a good strong tape, either packing or duct tape, tape the funnel to the jar so that you have a really good seal from which nothing can escape. If you have too much paper sticking above the jar you can cut this off. Then use some tape to make sure that there are no escape routes from your funnel, usually where the side of the paper meet together, don't forget to check the top too.
Whalla! You have one very nasty looking but highly effective fruit fly trap. Keep on the counter for about a week and then dispose.... or in my case take outside, clean out and then reuse the jelly jar.
Karla, I do the same thing. But different. I trim up the paper a bit closer to the lip of the jar, then fold it over the lip, then screw on a Mason jar screw on band. I guess that will only work if you use a mason jar. The funnel can be reused all summer long. I agree, these things are very handy. When is fruit fly season over, exactly?
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