What impacts the droplet size in aerial applications due to its ability to resist flow?

Extensional viscosity plays a crucial role in determining droplet size during aerial applications because it pertains to a fluid's resistance to deformation when subjected to extensional flow. In the context of spraying, this resistance directly affects how the liquid is broken into droplets by the application equipment. Higher extensional viscosity means that the fluid resists being stretched out into smaller droplets, leading to larger droplet formation. This is significant in aerial applications where droplet size can influence coverage, drift potential, and ultimately the effectiveness of the pesticide being applied.

Droplet size is essential for ensuring effective pest control: too small droplets can drift away from the target area, while too large droplets may not provide adequate coverage. By understanding and controlling extensional viscosity, applicators can optimize droplet size to enhance application efficiency and mitigate off-target issues.