Death to yellow jackets.
- One can of cheap chicken.
- Firponil (Sentry, Frontline, etc.)
Split the water from the chicken. Add 4-5 drops of fipronil (about 0.5 mL) to the water and mix. Don't use too much fipronil or the wasps won't eat it. Mash the chicken - it works best if the wasps can carry away small pieces. Recombine the water and the chicken. I get 4-5 bait stations out of a batch. They can be frozen for later use.
Give it a few days.