Keeping Wasps Away from a Pool

I don't know how you can specificially keep wasps away from a pool, but there are little plastic "wasp catchers" that you can hang around your patio or close by the pool to attract and catch wasps. They have holes in them and you add fruit or juice to the bottom of the container. They go in the holes and aren't smart enough :) to figure out how to get back out. They usually drown in the juice.