To obtain even coverage, make sure all the nozzles are the same and are equally spaced along the boom. Check each nozzle to make sure the flow rates are correct. Replace nozzles if the flow rates are 10 percent or more in error. Spray boom bounce should be minimized with support members. Irregular spray patterns result from damaged nozzle tips, mismatched nozzles and uneven booms.
Pesticide drift is a major concern.
In addition to reducing effectiveness, pesticide drift can damage non-target areas. One method to decrease drift is to use a low volatile formulation that is less likely to volatize and drift. Pesticide drift also can be controlled by reducing the number of small droplets emitted from the sprayer. Nozzle type, angle and orientation, boom height, and operating pressure can influence the production of driftable drops. Spray thickeners can reduce drift, as can spraying at low temperatures and high humidity.