I've tried several wasp bait products on the market, and yet find one to work as well as my homemade method. Place trap next to water. Bait trap with tuna or canned cat food. Workers from hives, be they bees, wasps or yellow jackets are female and all are attracted to sweet fruity scents. Sweet scents also travel farther in the breeze than would meaty scents.
Any fruit juice can be used, however, apple juice works best.
Once the wasp has located the sweet scent and or water source, then they start to hunt for meat, that's where the tuna or canned cat food comes in. The wasp will enter the trap, pick up a load of meat and attempt to fly straight up. This is why the trap must be made of clear glass or plastic. Not being able to get out of the trap, it will eventually tire and drown in the fruit juice. The panic scent secreted will in turn attract more wasps, therefore, trapping them too.