Spray drift can be costly (liability-wise) but also gives agriculture a negative image. Pay attention to boom height, nozzle selection, water volume, pressure, wind speed and direction, etc. Calibrate your sprayer before spray season begins. Be a good neighbor and make certain the product applied hits the target and the target only. The following link has more information on managing spray drift:http://www.ag.ndsu.edu/pubs/plantsci/weeds/a657w.htm