Best Yellow Jacket Lure
What's best to use in late summer?
Montana yellow jackets
Pheromones don't work late in the summer, but the traps they come with are still useful to trap marauding individuals. You'll only get a few because they have already established nests that they return to. If you can find the nests, you can eliminate quite a lot. You would want to do that after dark when they are all there. This time of year you can load those plastic traps with some smelly meat, like raw fish scrap. I've heard some people use cat food, but I don't know how effective that is.