How to get rid of wasps this summer! Mix vinegar, salt, and sugar in a container and leave it outside for the wasps to eat. They will be attracted to it because of the sugar, but the vinegar and salt will kill them
Natural Wasp Killer - Get Rid of Wasp Nests Without Chemicals
How to make a wasp, hornet or yellow jacket trap from a 2 liter bottle. To keep the bees from getting in here (and keep them doing their good job!) just add apple cider vinegar. Bees don't like the sour, but wasps do.