What is it called when a pesticide evaporates and moves off target?

The phenomenon of a pesticide evaporating and moving off-target is referred to as vapor drift. This occurs when volatile pesticides change from a liquid state to a gaseous state and can travel through the air, potentially affecting non-target plants, animals, or water sources. Understanding vapor drift is crucial for applicators as it emphasizes the importance of using pesticides responsibly and in a manner that minimizes environmental impact.

In contrast to the other options, vapor drift specifically highlights the movement of pesticides in the gaseous form, which can occur even under conditions that may seem safe for application, such as temperature fluctuations or wind. This concept is critical in the context of regulatory guidelines and effective pest control practices, ensuring that applicators take necessary precautions to minimize drift and protect surrounding areas.