What effect does high humidity generally have on pesticide drift?

High humidity generally decreases pesticide drift, which is important for effective aerial application. When humidity levels are high, droplets of pesticide tend to evaporate more slowly, allowing them to remain larger and heavier for a longer period. This can facilitate more precise targeting of the intended area and reduces the likelihood of the droplets being carried away by wind currents. Additionally, a higher humidity environment can promote better adhesion of the pesticide to the intended surfaces, leading to more effective pest control and minimizing off-target application concerns.

Other factors, such as wind speed and droplet size, do play significant roles in drift potential, but in the context of humidity alone, the tendency is for drift to be decreased in conditions of high humidity.