A pneumatic stripping system, in particular for stripping vine plants, intended to be mounted on an agricultural machine such as a tractor, and comprising: - a casing provided with an arm (3, 10, 16) intended to be mounted on the agricultural machine directly or via a frame, and provided with at least one opening (4 to 7), - pneumatic stripping means (8, 9) mounted in the casing, - a supply line able to supply compressed air to the stripping means (8, 9), and thus to allow stripping by projecting compressed air by the stripping means (8, 9) through the opening (4 to 7) in the casing, - at least two nozzles (12, 13) for projecting compressed air of different diameters, the system being characterized by: - a selector able to take a first and a second position in which it is capable of directing the flow of compressed air coming from the supply line exclusively towards a first, respectively a second, of the two nozzles (12, 13), so that when the airflow is directed towards one of the two nozzles, the stripping is carried out according to one of the two stripping intensities, and when the airflow is directed towards the other of the two nozzles, stripping is carried out according to the other of the two stripping intensities, - and in that this selector comprises a valve having at least one outlet capable of communicating alternately, by rotation of the valve around a central axis, with one or the other of the two nozzles (12, 13) in the first, respectively the second position of the selector. - a casing provided with an arm (3, 10, 16) intended to be mounted on the agricultural machine directly or via a frame, and provided with at least one opening (4 to 7), - pneumatic stripping means (8, 9) mounted in the casing, - a supply line able to supply compressed air to the stripping means (8, 9), and thus to allow stripping by projecting compressed air by the stripping means (8, 9) through the opening (4 to 7) in the casing, - at least two nozzles (12, 13) for projecting compressed air of different diameters, the system being characterized by: - a selector able to take a first and a second position in which it is capable of directing the flow of compressed air coming from the supply line exclusively towards a first, respectively a second, of the two nozzles (12, 13), so that when the airflow is directed towards one of the two nozzles, the stripping is carried out according to one of the two stripping intensities, and when the airflow is directed towards the other of the two nozzles, stripping is carried out according to the other of the two stripping intensities, - and in that this selector comprises a valve having at least one outlet capable of communicating alternately, by rotation of the valve around a central axis, with one or the other of the two nozzles (12, 13) in the first, respectively the second position of the selector. - a selector able to take a first and a second position in which it is capable of directing the flow of compressed air coming from the supply line exclusively towards a first, respectively a second, of the two nozzles (12, 13), so that when the airflow is directed towards one of the two nozzles, the stripping is carried out according to one of the two stripping intensities, and when the airflow is directed towards the other of the two nozzles, stripping is carried out according to the other of the two stripping intensities, - and in that this selector comprises a valve having at least one outlet capable of communicating alternately, by rotation of the valve around a central axis, with one or the other of the two nozzles (12, 13) in the first, respectively the second position of the selector.