Movement of pesticide in vapor or gas form is called?

• A. Drift
• B. Non-Target Movement
• C. Particle Drift
• D. Vapor Drift

Answer: (D)

Vapor drift occurs when a pesticide moves through the air as a vapor or gas. Some chemicals volatilize after application, turning into vapors that can be carried long distances by wind and air currents. This means the pesticide can reach areas away from the target site, even without any spray droplets being present. This is different from particle drift, which is the movement of liquid spray droplets, and from non-target movement, which is a broader term that can include both vapor and droplet movement. To reduce vapor drift, use products with lower volatility, apply under favorable weather conditions (cooler temperatures, lower wind speeds), and follow appropriate buffer zones.