What is drift, and which practices help minimize it during ground applications?

• A. Drift is spray deposition on target; use fine droplets, nozzles designed to maximize drift, apply at high height.
• B. Drift is off-target movement of spray droplets; use coarse droplets, drift-reducing nozzles, correct height, favorable wind conditions, and avoid applying near sensitive areas.
• C. Drift is water runoff; use more water.
• D. Drift is pesticide vaporization; increase temperature.

Answer: (B)

Drift is the off-target movement of spray droplets away from the intended target. To minimize drift during ground applications, use coarser droplets (larger droplets) because they’re heavier and less likely to be carried by air. Choose drift-reducing nozzles designed to minimize off-target movement. Maintain an appropriate height above the target—too high increases drift, while the correct height helps keep droplets where you want them. Apply under favorable wind conditions—steady, moderate winds that blow away from sensitive areas reduce drift risk. Also, avoid applying near sensitive areas such as homes, schools, water bodies, beehives, or other vulnerable sites.

The other options misdefine drift or suggest practices that increase drift: using fine droplets or maximizing drift potential, applying from a high height, or equating drift with runoff or vaporization.