Many years ago I was mowing the lawn and found a yellow jacket nest. Since we had young children, it had to be eliminated. While I was mowing I decided to dump a quart of gas in the hole, So I stop mowing and dumped the gas in the hole. As I finished mowing I decided to really finish the job I decided to light the gas.. When flames shot out of several holes around the yard I was not aware of, I realized it may not have been the best plan, BUT it worked. I never had a yellow jacket problem as long we lived there.

If I had the problem again I would push a hose down the hole and then add Raid of equivalent with a stream of air to move it into the recesses of the nest.

What ever you do you must make sure the the agent gets distributed through out the nest. other wise the yellow jacket just repair the damage.