The present invention relates to a spraying unit intended for spraying a liquid onto vegetation and including: a nozzle formed by a tube (1), a rotatable atomizer (3), and a fan generating a carrying air flow around said atomizer, a drive system, and transport means for transporting the liquid to said atomizer, which is capable of breaking the liquid up into droplets. The nozzle (1) encloses a body (5) surrounded by the carrying air flow and including a rotatable portion formed by the rotatable atomizer (3), the rotation of which causes droplets in the carrying air flow to be propelled, preferably in a direction substantially perpendicular to the longitudinal axis (X). The invention also relates to a compact spraying module including such a unit and to a spraying and control system including a plurality of such modules.
