The RA-4 nozzle is outside the recommended pressure range of 20 to 45 psi and should not be selected. Of the two nozzles, RA-6 may be preferred because it can operate at a lower pressure that creates larger drops and could provide better insurance against drift. After the nozzle orifice is selected, mount the nozzle brackets, flush the system, install nozzles, adjust spray heights and orientation for 100 percent overlap, and calibrate. Many row crop producers prefer band application of herbicides to save money. When compared to broadcast application, the savings can be substantial.
Mechanical cultivation can control weeds between the rows.
Even flat-fan nozzles are recommended for band application since they provide a uniform application across the entire width of the band. Consult the pesticide label. Unless otherwise specified, application rates are given on a broadcast basis. For band application, the rate per treated acre should be the same as the label rate. Remember the total amount of pesticide used is less because only a portion of the field is treated.