0 A method and device for spraying agricultural crops where a liquid, for example a fungi-insecticide, growth regulating substance or fertilizer, is atomized in a conical or flat spray plane (24), wherein the spray mantle (24) is partially interrupted so obtaining an asymmetrical spray picture whereby an accurate and even concentration can be achieved, said device being provided with an atomizing body (9) rotatable around a stationary part (1) formed as a hollow cylinder, whereby a groove (14) connecting with the cylinder space (3) is formed in the surface of the cylinder (1) over a circumferential portion, onto which ducts (12, 13 are arranged in the rotating atomizing body (9) in each case connect resulting in that a very even cone mantle with a vertical angle of 150° can be achieved so that the atomized liquid strikes the field produce on the underside of the leaves.