Drift of glyphosate application using backpack sprayers

ABSTRACT

The aim of this research was to compare the potential risk of drift caused by three backpack sprayer in the application of glyphosate herbicide. The sprayers evaluated were: hand-held backpack sprayer, pressurized sprayer and electrically driven centrifugal sprayer. The hand-held backpack sprayer and pressurized sprayer were tested with AXI 110015 and AXI 11003 nozzles. The drift potential was evaluated in the samples collected at 5, 10 and 15 m distances and at 0.2; 0.4; 0.6; 0.8 and 1.0 m height in the tunnel. The electrically driven centrifugal sprayer showed lower drift in relation to other equipment. The same nozzles, AXI 110015, evaluated in the wind tunnel, can offer different drift potential when used in pressurized sprayers and hand-held backpack sprayer.

Key words:
herbicide; spraying nozzles; application technology; backpack sprayers