What kills yellow jackets immediately?

What kills yellow jackets immediately? What kills yellow jackets immediately includes contact insecticides and physical methods. Commercial wasp and hornet aerosol sprays containing pyrethroids like tetramethrin, prallethrin, and permethrin kill on contact within seconds to minutes by attacking nervous system, best when sprayed directly at wasp or into nest entrance at night. Soapy water solution of dish soap mixed with water in spray bottle kills quickly by coating wings and blocking spiracles, causing suffocation, effective for individual wasps. Swatting or crushing kills instantly but risks sting and provokes others. For nests, direct spray of wasp killer into entrance kills many immediately, though some may survive deeper inside requiring second treatment. High heat like boiling water poured into underground nest can kill quickly. For fastest immediate kill, aerosol wasp spray that shoots 15 to 20 feet is most effective, causing paralysis and death almost instantly on direct contact, while soapy water is non-toxic quick alternative for small numbers.