Surfactant Effects on Aerial Spray Droplet Spectra

Abstract

Volumetric droplet size spectra of selected non-ionic surfactants as tank mix additives were evaluated in a wind tunnel. Metsulfuron methyl and paraquat were mixed at recommended rates prior to the addition of the surfactants. Four concentrations, 0.0625, 0.125, 0.250, and 0.500% v/v of six surfactants were atomized in a 58 m/s (131 mph) airstream using a D6-46 nozzle at 45 degrees down and back. Dv0.5, DvO.1 decreased with increasing surfactant concentration and % volume < 150μm increased. Significant differences between surfactants were detected.