An air-assist spray system has been designed and evaluated for application of pesticides in water, oil, and invert (water-in-oil) emulsion diluents. The system is capable of application rates as low as 2.3 L/ha. The major components of the spray system are: Hydraulic driven diaphragm air compressor; valveless, piston-type metering Pump; manifold distribution system; and atomizing nozzle tube. Low volume air (0.2 m3/min) at 20 to 140 kPa carries the liquid in 6.4 mm ID tubing to the nozzle tube where it is atomized and discharged. The nozzle tube consists of a 3.8 cm length of brass, plastic or other tubing material that is 4.7 mm OD and 2.4 mm ID. The sharp edge at the end of the tube provides the shear surface for atomization and a spray band of 25 to 35 cm is possible with the nozzle. Floodjet or other conventional spray tips can be attached to the TeeMizer tubular nozzle to provide additional band widths. The system has been successfully evaluated in both herbicide and insecticide field studies.