SEDL / STP / STP1146-EB / STP20205S

Adjuvants to Reduce Drift from Handgun Spray Applications

Salyani, M
Associate Professor, University of Florida, IFAS, Citrus Research and Education CenterUniversity of Florida, IFAS, Lake AlfredAssociate Professor and Extension Agricultural EngineerGainesville, FLFL

Cromwell, RP
Associate Professor, University of Florida, IFAS, Citrus Research and Education CenterUniversity of Florida, IFAS, Lake AlfredAssociate Professor and Extension Agricultural EngineerGainesville, FLFL

Pages: 14    Published: Jan 1993

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Abstract

The off-target drift deposits from handgun applications of two spray mixtures (one with an invert emulsion oil and one with a polymeric adjuvant) were compared to that of water, all containing a fluorescent dye tracer. Drift deposit samplers consisting of mylar sheets and air sampler filters were positioned at several locations downwind and around the line of spray application. Weather data were recorded by a weather station and the amounts of the tracer dye deposit on the targets were measured with a fluorometer.

Spray mixtures containing the adjuvants produced lower drift deposits, on both mylar sheets and filter papers, as compared to water only sprays. The use of invert emulsion oil (Visko-Rhap) resulted in the lowest drift deposits from handgun applications.