You can also get off-the-shelf yellow Jacket traps in most nurseries and home stores. They come with a pheromone bait (just be very careful that you don't get any of it on you). These work well in my experience here in So. Cal. I used them one year in my yard and didn't see another Yellow Jacket for several years after that!

Since they use pheromone's there are no pesticides involved.

Yellow Jacket trap