Which drift-related factor listed below is NOT a drift type?

Which drift-related factor listed below is NOT a drift type?

• A. Leaching
• B. Spray drift
• C. Vapor drift
• D. Particle drift

Answer: (A)

Drift refers to the movement of pesticide through the air away from the target site during or just after application. Spray drift is the random movement of spray droplets by wind. Vapor drift happens when a chemical volatilizes into the air and moves as vapor after application. Particle drift involves larger particles or dust being carried by air currents. Leaching, however, is the downward movement of pesticides through the soil with infiltrating water, driven by rainfall or irrigation and soil characteristics. It is a soil-borne fate process, not an air-drift phenomenon. So leaching is not a drift type.

Drift refers to the movement of pesticide through the air away from the target site during or just after application. Spray drift is the random movement of spray droplets by wind. Vapor drift happens when a chemical volatilizes into the air and moves as vapor after application. Particle drift involves larger particles or dust being carried by air currents. Leaching, however, is the downward movement of pesticides through the soil with infiltrating water, driven by rainfall or irrigation and soil characteristics. It is a soil-borne fate process, not an air-drift phenomenon. So leaching is not a drift type.