Texas Aerial Application of Pesticide Practice Exam

When considering the relationship between nozzle opening size and the percentage of spray volume in small droplets, it is understood that an increase in nozzle size typically leads to a change in the characteristics of the spray. Larger nozzle openings allow for a greater volume of liquid to pass through, which usually results in the production of larger droplets.

As the droplet size increases, the proportion of small droplets within the spray volume decreases. This is due to the fact that larger droplets will dominate the spray pattern, which leads to a reduced percentage of the total volume being comprised of small droplets. Consequently, if the nozzle opening size is increased, the generation of smaller droplets is suppressed, confirming that the percentage of spray volume represented by small droplets diminishes.

This principle is crucial in aerial application practices, as the size of the droplets can greatly influence the efficacy of pest control and the potential for drift. Therefore, understanding how nozzle size affects droplet size distribution is essential for effective pesticide application and environmental responsibility.