Abstract: To prevent damage to the bearings and to provide a finer mist, the body of a spray nozzle for use in aircraft has an outer surface which curves outwardly from its longitudinal axis in the forward portion to provide minimum turbulance and curves inwardly at its trailing section to cause air to converge at a vortex within a screen cage that rotates with the body of the nozzle. The body is rotated by a propeller on ball bearings around an applicator tube which has its outlet positioned adjacent to the vortex to guide insecticide or the like into the vortex for spraying through the rotating cage.