The spray bar has nozzles (6) separately formed by switching elements in a switched manner. The switching elements are electrically or pneumatically activated by a serial data bus system, and the spray bar is formed as a disk bar with a drive protection device (7). The drive protection device consists of partial segments, which are displaced together. A controller of a field spraying device activates or deactivates the nozzles by a switching program according to stored field data. A holder is provided with the nozzles.
