Abstract: The apparatus comprises at least one pesticide container (16), and a dosage pump (18) for the container or the containers, respectively, or for each container this pump or each of the existing pumps comprising a step motor controlled precision pump of the radial type which is connected via a pressure and check valve (21) to a mixing chamber (22) to be connected to one or more nozzle ramps (14) and having an inlet for water, to which the pesticide is to be added. The dose control apparatus also comprises a control unit (35) for adjusting the pump flow or the pump flows, respectively, in dependence on definite parameters, the driving speed being one.