Not wasps or yellow jackets, but some kind of ground nest hornets settled into my brother in laws yard. He tried different pesticides, failed, called a several pest companies and all said they did not and would not take the job. Finally youtube to the rescue. Turns out this particular pest has an oily protective coating. Dawn dish soap poured into the hole, then a bunch of water to create the suds. As the pests flew out through the suds, they would get coated, lose the oil and fly a bit more then crash and die.
