What is an important consideration when planning aerial pesticide applications in relation to the wind?

When planning aerial pesticide applications, making passes perpendicular or at an angle to the wind direction is crucial for several reasons. This approach helps to ensure that the pesticide is distributed more effectively and accurately over the target area. By flying perpendicular or at an angle to the wind, the applicator can mitigate the effects of drift, which can occur when wind carries the pesticides away from the intended application zone. Aligning the flight path in this manner allows for better coverage, reduces the chance of pesticides impacting non-target areas, and enhances the efficacy of the application overall.

It is also important to consider that flying against the wind can create turbulence and lead to uneven distribution of the pesticide, while flying with the wind may increase drift risk. Additionally, higher altitudes may not necessarily improve the application's effectiveness and can also increase drift due to wind currents at those heights. Applying pesticides only in calm winds is not practical, as completely calm conditions are rare; the key is to manage the wind's direction and speed effectively.