Accelerated, early planting in some parts of the state increases pressure on applicators of preemergence herbicide to speed up sprayers to cover a larger numbers of acres. Increased speeds increase boom pressure for existing nozzles, and can tempt applicators to increase boom height. Both increase drift potential.
If travel speed increases, consider using a slightly larger nozzle size to maintain desired droplet size and keep spray booms within 2 ft of the target.
Related ICM News articles:
Drift Management Considerations
Selecting Nozzles for Postemergence Herbicides
Spray Volume is Critical for Postemergence Herbicides
Related Publications:
Selecting the Correct Nozzle to Reduce Spray Drift
2016 Herbicide Guide for Iowa Corn and Soybean Production