Aside from external factors, which are the most important factors affecting off-target drift?

The size of the spray droplets and their size range are critical factors in determining off-target drift during aerial application. Smaller droplets have a greater surface area-to-volume ratio, which makes them more susceptible to wind and evaporation, increasing the likelihood of them drifting away from the intended application area. Conversely, larger droplets tend to fall more quickly and are less prone to drifting, reducing the risk of off-target movement.

Understanding droplet size is fundamental for ensuring effective pest management and minimizing environmental impact. Proper selection of nozzle types and adjustment of spray pressures can help create a droplet size that mitigates drift while still providing adequate coverage and efficacy of the application. This knowledge is essential for aerial applicators to comply with regulations and protect sensitive areas surrounding agricultural applications.