By using a simple, environmentally safe trap to lure yellow jackets, you can limit their numbers without losing all your yellow jackets or other beneficial insects.
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Add 1/2 cup water and 1/4 cup sugar to the soda bottle. Put the cap on the bottle and shake vigorously until the sugar dissolves. Add 1 cup vinegar to the solution and shake to mix well.
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Add the banana peel to the bottle, so the decaying fruit draws yellow jackets. Add enough water to fill the bottle halfway. Put the lid back on the bottle.
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Use the utility knife to cut a 3/4-inch square hole in the top portion of the bottle a few inches below the cap.
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Sit the bottle on a level surface near the wasp hive and far from where you don't want them to be. If desired, use a string to hang the bottle in a tree near the hive. Dispose of the bottle when full.