What kills wasp instantly?

What kills wasp instantly includes physical methods and certain chemicals that cause rapid death on contact, though humane deterrence and professional removal are recommended for nests. Fastest way to kill wasp instantly is physical crushing with fly swatter, shoe, or rolled newspaper that crushes wasp immediately, though this can provoke other wasps if near nest as alarm pheromones may be released. Vacuuming with strong suction removes wasp instantly and contains it, though wasp may not die immediately inside vacuum but will be trapped. Chemical methods that kill instantly on contact include insecticide sprays labeled for wasps containing pyrethrins, pyrethroids, or wasp freeze sprays that kill on contact within seconds when sprayed directly, and wasp sprays that shoot up to 20 feet can kill from distance. Soapy water spray kills wasps quickly by clogging spiracles and causing drowning, as soap breaks surface tension and suffocates wasp within minutes. Boiling water kills instantly when poured directly but is dangerous to use. For nests, professional pest control uses insecticidal dusts that kill colony quickly. However, killing individual wasps is not always necessary, as wasps are beneficial predators that control pest insects and pollinate, and indiscriminate killing can cause more aggression due to alarm pheromones. If wasp is indoors, trapping with cup and paper and releasing outdoors is humane alternative, and prevention through covering food and sealing trash reduces encounters.