Is it true that air speed does not need to be recalibrated when changing other variables like pesticide or adjuvants?

The assertion that air speed does not need to be recalibrated when changing other variables such as pesticide or adjuvants is false. Several factors can influence the efficacy of pesticide application, and air speed is a critical parameter that can significantly impact droplet size, drift potential, and distribution pattern of the pesticide being applied.

When you change similar factors, including the type of pesticide or the inclusion of different adjuvants, the properties of the spray mixture can alter its behavior in the air. These changes can affect how the pesticide is atomized, which in turn can impact the optimal air speed for effective application. For instance, heavier droplets may require a different air speed to ensure proper coverage and minimize drift, while lighter droplets might be more susceptible to wind drift and could necessitate a different speed.

Therefore, to maintain application efficacy and safety, recalibrating air speed in response to changes in applied materials is essential. This ensures that the aerial application remains effective while minimizing environmental risks and maximizing target coverage.