Which wind speeds are needed for ULV spraying?

Which wind speeds are needed for ULV spraying?

• A. 12-20 mph
• B. 0-2 mph
• C. 2-8 mph
• D. 8-12 mph

Answer: (C)

ULV spraying uses extremely fine droplets that stay suspended in the air, so wind speed greatly affects both how well the spray reaches target surfaces and how much drifts to unintended areas. A light, steady breeze around 2 to 8 miles per hour provides the best balance: it carries the tiny droplets through the treated area to contact surfaces without driving them far off-target. If the wind is too calm, droplets tend to fall out near the release point and coverage can be uneven; if it’s stronger, the mist can drift beyond the target and increase the risk of off-target deposition. So, the recommended wind range for ULV spraying is about 2–8 mph.

ULV spraying uses extremely fine droplets that stay suspended in the air, so wind speed greatly affects both how well the spray reaches target surfaces and how much drifts to unintended areas. A light, steady breeze around 2 to 8 miles per hour provides the best balance: it carries the tiny droplets through the treated area to contact surfaces without driving them far off-target. If the wind is too calm, droplets tend to fall out near the release point and coverage can be uneven; if it’s stronger, the mist can drift beyond the target and increase the risk of off-target deposition. So, the recommended wind range for ULV spraying is about 2–8 mph.