AOJ Outdoors Tip – Eliminate Yellow Jackets With This Non-Toxic Homemade Yellow Jacket Trap!:
How It Works: The yellow jackets love fish and will begin to cut off small pieces to take back to the nest. In their “excitement” of buzzing around the bait a few will occasionally hit the water. The soap in the water breaks the surface tension of the waterproof coating on the yellow jacket and it instantly sinks in the water and drowns in a few seconds. Some yellow jackets will successfully haul a piece of meat back to the nest and tell all the other gatherers in the nest where this great food source is. Soon all the wasps from the nest will be working on this fish and over a period of time, all will eventually make mistakes and either fall off the fish and into the water or bump other wasps flying around and knock themselves in the drink, then its curtains for them too. It only takes a day or two to wipe out nearly every yellow jacket in your area.
Put the trap on a table or other high area outside so that kids and pets will not be able to get close to it. A piece of fish with vertical sides works best for having the insects fall off easier.
I knew or suspected yellow jackets liked fish but never thought of something like this.