A spreading vehicle for spreading, over a large area, substantially spherical spreading units containing useful organisms suitable for biological pest control and having a mean diameter between 15 mm and 30 mm and a mean density between 0.08 g/cm 3 and 1.5 g/cm 3 in an agricultural, silvicultural or horticultural terrain by moving the spreading vehicle in tracks over the ground of the terrain and shooting the spreading units in an individually clocked manner by means of compressed air from a plurality of freely discharging delivery pipes directed sidewards on both sides of the vehicle, characterised by the following features: the spreading vehicle is equipped with a spreading apparatus, which comprises a housing, a storage space for the spreading units, and a plurality of delivery pipes for the spreading units to be spread; the delivery pipes are fluidically connected to the inside of the housing; at least two of the delivery pipes are oriented so as to open out on different sides of the vehicle; at least one compressed air blower is provided, which is suitable for continuously conveying air sucked in from the surroundings through the housing and through the delivery pipes at a rate of at least 20 m/s and at the same time to generate an overpressure in the housing of at least 5 mbar; the spreading device has a means for separating the spreading units and for feeding said units in a clocked manner to the delivery pipes; the separating means here comprises a drum, which is driven in rotation, is sealed off at the end faces with respect to the housing, is exposed internally to the ambient pressure or a pressure level lying between ambient pressure and the housing overpressure, said drum having rows, extending in the peripheral direction, of holes distanced from one another and a non-rotating covering means, which bears internally against the drum, for closing the holes over a specified angular range, wherein the holes in the individual rows of holes in the drum are offset in relation to one another in the peripheral direction. the spreading vehicle is equipped with a spreading apparatus, which comprises a housing, a storage space for the spreading units, and a plurality of delivery pipes for the spreading units to be spread; the delivery pipes are fluidically connected to the inside of the housing; at least two of the delivery pipes are oriented so as to open out on different sides of the vehicle; at least one compressed air blower is provided, which is suitable for continuously conveying air sucked in from the surroundings through the housing and through the delivery pipes at a rate of at least 20 m/s and at the same time to generate an overpressure in the housing of at least 5 mbar; the spreading device has a means for separating the spreading units and for feeding said units in a clocked manner to the delivery pipes; the separating means here comprises a drum, which is driven in rotation, is sealed off at the end faces with respect to the housing, is exposed internally to the ambient pressure or a pressure level lying between ambient pressure and the housing overpressure, said drum having rows, extending in the peripheral direction, of holes distanced from one another and a non-rotating covering means, which bears internally against the drum, for closing the holes over a specified angular range, wherein the holes in the individual rows of holes in the drum are offset in relation to one another in the peripheral direction.