Abstract
Novel drift reduction technologies (DRTs) that can work under a wide variety of conditions are needed to address the increasing complexity of spray tank mixtures. Conventionally, large molecular weight polymer-based DRTs are thought to work by altering the rheological properties of agricultural spray solutions. Specifically, DRT polymers increase the extensional viscosity of the spray solution, which becomes significant under high-shear spraying conditions. In this paper, a novel polymeric drift control agent, AL-3412, is introduced. AL-3412 works through means other than altering the rheological properties of the solution, similar to oil-emulsion-based DRTs. Spray patterns of solutions with and without DRTs are characterized in a vertically oriented low-speed wind tunnel. Measurements reveal how AL-3412 affects the droplet size distributions of active spray solutions and how it may be used in conjunction with oil-emulsion-based DRTs.
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