Which statement about particle drift is true?

Particle drift refers to the unintended movement of pesticide particles away from the target area during application. The correct choice states that this phenomenon involves solid particles moving off-target. This is true because particle drift can occur with both solid and liquid formulations of pesticides, as particulates can become airborne and travel with the wind.

Understanding the behavior of these particles is crucial in pesticide application, as it helps in formulating strategies to minimize off-target movement and ensure that the pesticides effectively reach their intended areas while reducing environmental impact.

The other statements are misleading; for example, particle drift is not exclusive to liquid applications, and both solid and liquid formulations can experience drift. Additionally, comparing the harm of particle drift to spray drift is not straightforward, as both can cause environmental harm depending on the situation. Lastly, humidity levels do not restrict the occurrence of particle drift; it can happen under a range of environmental conditions.