When ground or aerial spraying is conducted for mosquito control, droplet size is primarily determined by:

The determination of droplet size during ground or aerial spraying for mosquito control is primarily influenced by the nozzles of the application equipment. Nozzles play a crucial role in breaking up the liquid into smaller droplets that can effectively disperse the pesticides over a target area. Different nozzle designs and settings can create various droplet sizes, which can impact the effectiveness of the application.

Additionally, the characteristics of the nozzle—including its orifice size and shape—are engineered to produce a specific droplet spectrum, catering to the type of pesticide being used and the particular environmental conditions where the spraying occurs. Ensuring the correct droplet size is essential for achieving optimal coverage and efficacy while minimizing drift and potential non-target exposure.

While other factors, such as temperature and humidity, pressure of the spray system, and screens inside the liquid reservoir, can influence the overall application process or the behavior of the droplets after they are formed, the primary determinant of initial droplet size fundamentally rests with the design and configuration of the nozzles.