Atomizer for spraying products for agriculture, in particular for treatments on plantations, which comprises: - a support frame susceptible of advancing on the ground in a travel direction; - a containment tank for containing at least one liquid product to be dispensed, mounted on said support frame; - ventilation means supported by said support frame, comprising at least one fan in order to generate an air flow and at least one conveyor, which receives the air flow from the fan and orients it substantially transverse to the travel direction in order to treat the plantations; - distribution means for distributing the liquid product contained in said containment tank, comprising a plurality of nozzles hydraulically connected to said containment tank, and mechanically associated with said conveyor; characterized in that: - said distribution means comprise at least one pump provided with at least one shaft arranged for being mechanically connected to the power take-off of a tractor; - said ventilation means comprise: - an alternator mechanically connected to the shaft of said pump, in order to generate electrical energy; - an electric motor, which is mechanically connected to said fan; - an electronic control group, which receives the electrical energy from said alternator and power supplies said electric motor; said atomizer also comprising at least one detection sensor susceptible of detecting the leaves of plantations, oriented substantially transverse to the travel direction of said atomizer; - at least one logic control unit in signal communication with said detection sensor, and with said electronic control group and configured for controlling the power supply of said electric motor through said electronic control group as a function of the signals of said detection sensor. - a support frame susceptible of advancing on the ground in a travel direction; - a containment tank for containing at least one liquid product to be dispensed, mounted on said support frame; - ventilation means supported by said support frame, comprising at least one fan in order to generate an air flow and at least one conveyor, which receives the air flow from the fan and orients it substantially transverse to the travel direction in order to treat the plantations; - distribution means for distributing the liquid product contained in said containment tank, comprising a plurality of nozzles hydraulically connected to said containment tank, and mechanically associated with said conveyor; - said distribution means comprise at least one pump provided with at least one shaft arranged for being mechanically connected to the power take-off of a tractor; - said ventilation means comprise: - an alternator mechanically connected to the shaft of said pump, in order to generate electrical energy; - an electric motor, which is mechanically connected to said fan; - an electronic control group, which receives the electrical energy from said alternator and power supplies said electric motor; said atomizer also comprising at least one detection sensor susceptible of detecting the leaves of plantations, oriented substantially transverse to the travel direction of said atomizer; - an alternator mechanically connected to the shaft of said pump, in order to generate electrical energy; - an electric motor, which is mechanically connected to said fan; - an electronic control group, which receives the electrical energy from said alternator and power supplies said electric motor; - at least one logic control unit in signal communication with said detection sensor, and with said electronic control group and configured for controlling the power supply of said electric motor through said electronic control group as a function of the signals of said detection sensor.