What is vapor drift?

Vapor drift refers specifically to the off-target movement of pesticides in the form of vapor. This can occur when volatile herbicides evaporate from the treated area and are carried by air currents to other locations, potentially affecting non-target plants and the environment. Understanding vapor drift is crucial for applicators to minimize unintended harm and ensure compliance with safety regulations.

The other choices address different concepts unrelated to the specific process of pesticide vaporization and movement. The movement of solid particles in the air pertains to dust or particulate matter, while horizontal movement of droplets involves liquid spray patterns, which are distinctly different from vapor. Application at higher pressures may influence droplet size but does not inherently relate to the vaporization or off-target movement of pesticides.