Which droplet size is typically recommended for aerial application to reduce drift?

For aerial application, large droplets are typically recommended to reduce drift. The primary concern when applying pesticides or fertilizers by air is the potential for these materials to drift away from the intended target due to wind or other atmospheric conditions. Large droplets are less susceptible to wind currents compared to smaller droplets, so they tend to fall closer to the ground where they were released, minimizing off-target movement.

In contrast, very fine, medium, and ultra-fine droplets are more prone to drifting because their smaller size allows them to be more easily carried away by wind. The aerodynamic forces acting on smaller droplets are significantly greater, which increases the likelihood of them being displaced from the desired spray area. Therefore, using large droplets is a strategic choice made to ensure higher efficiency in application while also reducing environmental impact and improving safety.