My son had wasps around the last couple years. He got some kind of powder that he sprayed in the areas where they nested and they are pretty much gone this year. It was like flea powder and the wasps get it on their feet and carry it back to the nest. It really worked well. Here's some.
[URL]https://www.google.com/search?...C8QQ0pQJegQIUhAB&biw=1366&bih=619&dpr=1#spd=0[/URL]