Abstract: A system and method for applying extermination materials that includes a chamber for containing a volume of an extermination material, a gas source, and an applicator that are fluidly connected to one another. The chamber houses a dry exterminating treatment material that is communicated to the applicator by a flow originating from the gas source. The extermination treatment material is atomized and expelled from an injector supported by the applicator. The injector is constructed to pass through a wall covering and discharge the atomized treatment material into a wall cavity.