Some operation al parameters of Micromax rotary atomizers in the application of glyphosate were studied under laboratory conditions. Micromax nozzle at 1.600 rpm and 0,96 1/min feed rate produced 280m vmd droplets and 0,43 1/min feed rate, produ ced 232 m vmd droplets. In both conditions the dispersion coefficien t (r = vmd/nmd) was bellow 1,4, attending to the spedfication for CDA. Nozzl espacement between Micromax heads in a spray boom was estab lished as 1,80 m for 0,96 1/min feed rate using 4% to 6% glyphosate (commercia l) solution and 1,40 m for 0,43 Z/min feed rate using 9% to 13% solution. Nozzle spacement out of these specifications produces very irregular deposition patterns.
CDA; centrifugal nozzle; rotary atomizer; deposition pattern; spray