What weather factors reduce drift?

The correct answer focuses on the combination of environmental conditions that minimize the drift of pesticides during application. Lack of wind is crucial because wind can easily carry pesticide particles away from the target area, leading to off-target effects and potential harm to non-target species and habitats.

Low temperatures tend to increase the viscosity of spray solutions, which can help in ensuring that the droplets remain larger and are less prone to being lifted into the air by wind currents. This helps to keep the application more focused on the intended area.

High humidity plays a significant role as well; with higher moisture in the air, the immediate environment around the spray reduces evaporation rates. This means the droplets remain intact for longer periods, which decreases the chance that they will be entrained in the air and carried away.

Together, these conditions create an environment where the risks associated with drift are reduced, making pesticide application more effective and safer. Other combinations of weather factors, such as high winds, low temperatures, or very low humidity levels, would not provide the same benefits and could exacerbate issues with drift.