At what droplet size does spray drift become a concern?

Spray drift becomes a significant concern at droplet sizes of 200 microns and below. This size range is critical because smaller droplets are more susceptible to being carried off by wind or other environmental factors. As droplets decrease in size, their behavior changes significantly; they can remain airborne longer and travel greater distances before landing. This increases the likelihood of unintended application on nearby areas, such as neighboring crops or sensitive habitats.

Understanding this threshold is essential for aerial applicators to minimize the impact of their applications and ensure that they comply with regulations aimed at protecting non-target areas. The awareness of droplet size and its relation to drift potential is a vital part of integrated pest management and responsible pesticide application practices.