During what condition does spray drift commonly occur?

Spray drift occurs when wind blows the spray droplets away from the intended target site during application. This phenomenon is particularly significant because it can result in the unintended application of pesticides or other chemicals to non-target areas, potentially harming beneficial plants, wildlife, and water sources. Wind speed and direction at the time of application play a crucial role in the likelihood of drift occurring.

Understanding that larger droplets tend to fall more quickly due to gravity, while smaller particles can be carried further by the wind, highlights the precision needed when selecting the timing and conditions for application. Environmental factors, such as temperature variations and wind, are critical in managing and minimizing the risk of drift.

The other conditions mentioned, while relevant to safe application practices, do not directly relate to the phenomenon of drift as described in this context. They may lead to other issues, but they do not specifically cause the spray to move off-target during application.