Which term best describes the movement of a pesticide from the site of application to non-target areas?

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

Answer: (A)

Drift describes the movement of pesticide through the air from the application site to non-target areas. When you spray, small droplets or vapors can be carried by wind during or just after application, causing off-target deposition on nearby plants, surfaces, or water. This makes drift the best term for the described movement. Runoff refers to pesticide carried by water across the soil surface, typically during rain or irrigation. Leaching is the downward movement through soil toward groundwater. Volatilization is the pesticide turning into a gas and moving with air, which can contribute to off-target exposure but is not the spray-off-target transfer itself. So for movement from the application site to non-target areas, drift is the right concept.