What does vapor drift refer to?

Vapor drift specifically refers to the movement of pesticides in a gaseous form. This process occurs when volatile components of a pesticide evaporate and then travel through the air, potentially affecting non-target areas, plants, or organisms that are not intended to be treated. Understanding vapor drift is crucial for pest control professionals, as it emphasizes the importance of application techniques and timing to minimize unintended exposure to sensitive plants or nearby environments.

In contrast, other forms of pesticide movement, such as in liquid or solid particles, do not fall under the definition of vapor drift. Liquid pesticide movement typically occurs through water runoff or spray drift, which involves droplets being carried by wind or movement on the ground. Absorption by soil refers to a completely different mechanism, where pesticides penetrate the ground rather than being airborne.