California Applicator License Category D Plant Agriculture Practice Test

When the formulation you’re using has a high drift potential, the goal is to keep as many droplets as possible within the target area. Spray shields provide a physical barrier around the boom that intercepts and deflects droplets, reducing the amount that can drift to adjacent fields, water, or people. This makes them the most effective option for containing drift compared with other choices like adjusting nozzle size or pump settings alone. Wide nozzles can produce larger droplets, which helps reduce drift somewhat, but they don’t offer a protective barrier; low-pressure pumps or large tanks don’t directly address off-target drift. So, spray shields are the best fit for minimizing drift with drift-prone formulations.