What is the term for the unwanted movement of pesticides through the air to non-target areas?

• A. Drift
• B. Runoff
• C. Leaching
• D. Erosion

Answer: (A)

Drift is the unwanted movement of pesticide through the air from the application site to non-target areas. This happens when fine spray droplets or vapor are carried by wind, potentially reaching neighboring crops, wildlife, people, or water sources. Understanding drift helps you apply pesticides more safely and effectively by choosing appropriate nozzle types and droplet sizes, applying under suitable wind conditions, and using drift-reduction practices like lowering boom height and maintaining proper pressure.

Other terms refer to different movement pathways: runoff is pesticide movement with water across the surface to surface water; leaching is movement through the soil with water down to groundwater; erosion is soil movement that can transport residues but isn’t the air-driven spreading described by drift.