What type of nozzle would be the best for low-pressure herbicide applications where drift is a concern?

What type of nozzle would be the best for low-pressure herbicide applications where drift is a concern?

• A. Small flooding nozzle
• B. Fine spray nozzle
• C. Cone nozzle
• D. Jet nozzle

Answer: (A)

When drift is a concern, you want droplets that are large enough to fall to the target rather than drift with the air. Droplet size is influenced by both nozzle design and operating pressure, and running at lower pressure tends to produce coarser droplets because there’s less atomization. A small flooding nozzle is designed to deliver a wide, coarse spray at lower pressures, creating larger droplets that are less likely to be carried off target by wind. This combination—low pressure with a nozzle that produces coarse droplets—minimizes drift while still providing adequate coverage on turf. Fine spray nozzles produce many small droplets that are easily carried by air currents, increasing drift risk. Cone nozzles can vary in droplet size, but at low pressure they don’t inherently guarantee the coarse droplets needed for drift control. Jet nozzles produce a focused, high-velocity stream that can drive off-target movement and create uneven coverage, making drift more likely.

When drift is a concern, you want droplets that are large enough to fall to the target rather than drift with the air. Droplet size is influenced by both nozzle design and operating pressure, and running at lower pressure tends to produce coarser droplets because there’s less atomization.

A small flooding nozzle is designed to deliver a wide, coarse spray at lower pressures, creating larger droplets that are less likely to be carried off target by wind. This combination—low pressure with a nozzle that produces coarse droplets—minimizes drift while still providing adequate coverage on turf.

Fine spray nozzles produce many small droplets that are easily carried by air currents, increasing drift risk. Cone nozzles can vary in droplet size, but at low pressure they don’t inherently guarantee the coarse droplets needed for drift control. Jet nozzles produce a focused, high-velocity stream that can drive off-target movement and create uneven coverage, making drift more likely.