What is the purpose of a drift assessment before applying pesticides near non-targets?

• A. To measure droplet color
• B. To determine the best time of day
• C. To decide which pesticide to use
• D. To evaluate how far droplets may travel and implement drift-reduction measures if needed

Answer: (D)

Understanding how far pesticide droplets can travel under current conditions is the focus here. A drift assessment estimates the potential travel distance of spray from the target area, taking into account droplet size, nozzle type, spray pressure, application height, wind speed, and atmospheric conditions. This prediction lets you decide whether drift-reduction steps are necessary to protect nearby non-targets like adjacent landscapes, water sources, or people. It’s about preventing off-target movement and choosing mitigation when needed, not about droplet color, timing of day, or which pesticide to use. When the assessment shows a risk of droplets reaching non-targets, you would implement drift-reduction measures such as using coarser droplets, drift-reducing nozzles, lowering spray pressure, keeping the nozzle closer to the target, and avoiding application during unfavorable winds or temperature inversions.