What percentage of droplet size is affected by nozzle pressure during spraying?

The correct choice indicates that nozzle pressure affects droplet size by 10-20%. This relationship is significant because increasing the pressure at the nozzle leads to smaller droplet production. A higher pressure breaks the liquid into finer droplets due to the increased energy being imparted to the liquid as it exits the nozzle.

Understanding this concept is crucial for aerial application, as different crops and pesticides may require specific droplet sizes for effective coverage and to optimize the application’s efficacy while minimizing drift. Using the appropriate pressure settings allows applicators to match their equipment to the specific requirements of the pesticides being applied and the environmental conditions, ultimately improving the efficiency and effectiveness of the application.

The other options suggest smaller or larger percentages or even a notion that droplet size is not significantly affected by nozzle pressure, which misrepresents the impact that pressure has on the formation of droplets during the spraying process. Thus, the 10-20% range represents a moderate but notable effect, aligning with established best practices in pesticide application.