What does "vapor drift" refer to in pesticide application?

Vapor drift refers specifically to the movement of pesticide in gas form. This phenomenon can occur after a pesticide has been applied, particularly when certain conditions, such as temperature and humidity, allow the chemicals to volatilize, turning them into gas. Once in this gaseous state, the pesticide can be carried away by air currents, potentially impacting non-target areas or organisms that are not intended to be treated. Understanding vapor drift is crucial for ensuring that pesticide applications are conducted safely and effectively, minimizing unintended exposure to people, animals, and the environment.

Other concepts, like the movement of pesticide droplets or physical drift of spray from equipment, represent different aspects of pesticide application and do not pertain to the gas phase of pesticides. Excess application of pesticide also does not relate to the definition of vapor drift, as it refers to the quantity of pesticide applied rather than its movement in vapor form. This distinction helps in managing pesticide application more responsibly and effectively.