Abstract: A grove sprayer includes a wheeled vehicle having at least one blower thereon blowing into a cowling for directing the air to the side of the sprayer onto the grove foliage. A plurality of spray nozzles are located in the cowling openings in position to cover a plurality of spray zones. A plurality of foliage sensors are positioned to cover a plurality of spray zones for detecting when foliage is located within each spray zone. The foliage sensors actuate each spray nozzle responsive to foliage being sensed within a spray zone, so that only those spray nozzles are actuated to spray foliage. The foliage sensors actuate the spray nozzles after a measured delay to compensate for the length of the moving vehicle. A speed sensor varies the liquid feed to the nozzles and provides a signal by which the delay is determined between the foliage sensor positions and the nozzle positions of the moving vehicle.