Influence on drift reduction by combining nozzle profile, droplet size and surfactant concentration

Abstract

Surfactants are adjuvants used in combination with Plant Protection Products (PPP) to enhance spray droplet properties by reducing surface tension. A research work explored the effect on potential drift for specific surfactants when used with horizontal boom sprayers, combining nozzle pattern (hollowcone or flat-fan pattern), droplet sizes (fine and very coarse), and nozzle type (conventional and airinduction). The study followed ISO 22401 standard, utilizing a test bench with slots for Petri dishes and a pneumatic system to cover or expose them to air. The nozzles selected for all applications, including the reference, were: XR8002 (conventional flat-fan), ID9002 (air-induction flat-fan), ATI8002 (conventional hollow-cone), and ITR8002 (air-induction hollow-cone). Four scenarios were tested: 1) reference; 2) adjuvant ADY1 at 0.05% concentration; 3) adjuvant ADY2 at 0.25% concentration; and 4) adjuvant ADY2 at 0.50% concentration. This last adjuvant with the lowest concentration reduced drift compared to the reference application with conventional nozzles. On the other side, anti-drift nozzles showed similar behavior among trials. This research highlights the potential of appropriate surfactants in mitigating drift risk during spray applications.

Postprint (published version)