Which drift type is the primary focus of drift control strategies?

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

Answer: (B)

Particle drift refers to the movement of spray droplets as individual particles through the air after you apply them. Drift control strategies focus on this because it’s the most immediate and controllable way to keep the pesticide on the target. Droplet size, nozzle type, spray pressure, and boom height all influence how far and in what pattern droplets travel, so using coarser droplets, drift-reducing nozzles, lower boom heights, and appropriate wind/temperature conditions directly reduces off-target movement.

Vapor drift, by contrast, comes from volatilization of certain chemicals after they land, and is more about formulation, product volatility, and timing rather than the physics of droplets in flight. Non-target drift is a broader term, but the practical, actionable focus in drift control is on particle drift because it’s the aspect you can most reliably influence during application.