Which factor does NOT affect off-target pesticide drift?

The factor that does not affect off-target pesticide drift is the presence of a constant 3 mph wind. While wind is a critical element to consider when applying pesticides, maintaining a constant wind speed, in this case, does not lead to variability in drift potential. Drift is more heavily influenced by changes in wind speed and direction, which can cause pesticides to be carried away from the intended target.

On the other hand, factors such as nozzle orientation, spray pressure, and the physical properties of the spray mixture play significant roles in determining how well the pesticide is delivered and the potential for drift. For example, nozzle orientation can affect droplet size and trajectory, influencing how the spray interacts with the wind. Spray pressure impacts the droplet formation and size, which can modify drift distances. Additionally, the physical properties of the spray mixture, such as viscosity and volatility, will influence how the droplets behave after they are released into the air.