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Abstract
A tripod-supported boom sprayer was developed and used to spray herbicides on shrubs up to 15 feet tall on experimental plots where use of other spray equipment was not feasible. A pneumatic pressurized sprayer with 10 diaphragm nozzles, geometrically spaced along the outer 20 feet (6.1 m) of a 25-foot (7.6-m) boom, distributed the spray uniformly. Brush leaves were well covered with droplets of relatively uniform size at low dosages. The volume of spray applied per acre could be readily changed from plot to plot by varying the number of revolutions of the boom over the circular plot. Each revolution of the boom applied either 1 or 2.5 gallons per acre, depending upon the size of nozzle orifice and spraying pressure used.
Citation
Graham, Charles A.; Bentley, Jay R. 1975. Portable tripod-mounted boom sprayer for applying herbicides on tall shrubs. Res. Note PSW-RN-302. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p
