The best wasp/yellowjacket repellant for summer picnics: 2 ounces of mint extract. 2 ounces peppermint extract. 10 ounces rubbing alcohol. Pour ingredients into spray bottle and label. Spray down picnic area and play area. The mint is neurotoxic to bees and wasps. Somehow they know to stay away, but if you spray it on them directly it can also kill them.
Wasp Spray; I can REALLY attest to it's effectiveness in killing wasp. Dish detergent and warm water in a sprayer! The wasps were dying right before my eyes! I would call that instant gratification. Just spray it repeatedly.
To keep wasps from setting up a home near your front door or around your home - mix 2-3 tablespoons of Dawn dishsoap and about 2-3 cups of water. Put into a spray bottle, shake and that's it. Spray where they keep coming back to, to make a new nest. This will also kill them and drop them like a hat.
Self Defense: Wasp Spray A Church worker in a high risk area was worried about a robbery while they counted the collection. She asked the police about pepper spray. They told her to get wasp spray instead. The wasp spray can shoot up to 20 feet away and is a lot more accurate, while with the pepper spray, they have to get too close & could overpower you. The wasp spray temporarily blinds a robber until they get to the hospital for an antidote.