True or False: Spray drift can occur under calm or stable wind conditions.

Spray drift can indeed occur under calm or stable wind conditions, making the statement true. Even when environmental conditions appear to be calm, small air currents or temperature fluctuations at the ground or canopy level can lead to the movement of pesticide particles away from the intended application zone. Factors such as equipment settings, droplet size, and the nature of the herbicide can also influence drift. It's important for applicators to be aware that spray drift is not solely dependent on high wind speeds; rather, it can happen under various situations, including those where wind seems negligible. Understanding this helps ensure that herbicides are applied effectively and safely, minimizing unintended impact on nearby plants, water sources, and non-target organisms.