Abstract
DropletScan software and a flatbed scanner were used to analyze spray droplets collected on water–sensitive paper. Collections on water–sensitive papers were made from a ground sprayer during in–field herbicide efficacy trials. In a separate procedure, water–sensitive papers were used to collect downwind spray droplet deposits. The purpose of each procedure was to assess the ability of DropletScan. to measure the differences in spray droplet characteristics on water–sensitive paper. DropletScan. generates several droplet statistics including DV0.1, DV0.5, DV0.9, number of droplets under 200 microns per unit area, deposition/GPA, and percent area coverage. In each evaluation procedure an extended range flat–fan nozzle was compared to an air–induction flat–fan nozzle at different application volumes and pressures. Based on the procedures used in this assessment, DropletScan. effectively measured differences in spray droplet characteristics for both in–field and downwind collections of spray droplets.
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