What term is used to describe when a pesticide evaporates and moves off target?

The term that describes when a pesticide evaporates and moves off target is "Vapor Drift." This phenomenon occurs when pesticides, particularly those that are volatile, transition from liquid to gas and subsequently disperse into the air. This movement can result in unintended exposure to non-target plants, animals, or humans, making it a crucial concept in pesticide application safety. Understanding Vapor Drift is essential for applicators, as it underscores the importance of using pesticides in a manner that minimizes off-target movement and potential environmental consequences.

While "Volatile Release" refers to the process of pesticides becoming gaseous, it does not specifically capture the movement away from the intended application area. "Pesticide Loss" is a broader term that can encompass various forms of pesticide dispersal or degradation, and "Drift Phenomenon" generally refers to the movement of pesticides through air but does not specifically mention vaporization as a mechanism. Therefore, Vapor Drift is the most accurate term for the situation described in the question.