Check Wind Speed, Direction and Follow the Herbicide Label for Effective Application
Watch wind speed and direction and follow label requirements when making herbicide applications.
“Always read product labels carefully and understand requirements before using any pesticide,” says Steve Snyder, herbicide trait field specialist. “You need to know what crops surround your fields and whether or not they’re susceptible to the products you apply.”
Applicators must understand wind directional buffers and downwind susceptible crops: If cotton without the Enlist™ trait is downwind, do not spray Enlist™ herbicides. No buffer distance is acceptable from adjacent downwind susceptible crops. Wait to spray an Enlist herbicide until the wind is blowing away from a susceptible crop.
Ideal conditions for applying Enlist Duo® and Enlist One™ herbicides include wind speeds of 3 to 10 mph, no higher than 15 mph. Check state regulations because there may be additional requirements. For example, the maximum wind speed for applying Enlist herbicides in Texas is 10 mph.
Monitoring the wind
Measure wind speed and monitor wind direction in the field before starting to spray. Continue monitoring throughout the application. Don’t spray unless wind speed and direction favor on-target application.
It’s also important to watch for temperature inversions. A temperature inversion occurs when a layer of warm air covers a layer of cooler air, effectively putting a lid on the surface-level air that prevents it from rising and mixing normally into the upper atmosphere. Gases trapped near the surface can’t mix and dissipate, so they hover near the ground and often drift sideways.
Very low winds (0 to 3 mph) and temperatures close to the overnight low favor the formation of a temperature inversion. Do not apply any pesticide during these conditions.
Enlist Duo is a proprietary blend of new 2,4-D choline and glyphosate, and Enlist One is a straight-goods 2,4-D choline. Both feature Colex-D® technology, which limits drift and provides near-zero volatility after application.