Spray drift during pesticide application remains a big concern for potential environmental effects and property damage. Spray nozzle selection and application parameters are critical to reduce the spray drift during application, yet the physical properties of the spray solution can have significant effects on the spray drift control performance. Herein, the spray drift control performance of three types of commonly used drift reduction additives (emulsions, polymers, surfactants) is systematically evaluated. The spray drift control performance is demonstrated by substantially lowering the fraction of driftable fines (spray droplets = 150 �m) in spray application. The effect of tank mix conditions (such as ammonium sulfate, drift reduction additive, and tank mixing partners) on the spray control performance is discussed, followed by the study on the impact of spray nozzles. Our research shows that it is critical to evaluate the drift control performance using practical spray solutions to achieve robust spray drift control.

Impact of spray solution physical properties on robustness of spray drift control

248th National Meeting (2014)

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