Abstract: A cover attachment which can be used on a conventional field sprayer or as original equipment includes the plurality of separate arch-shaped arms extending rearwardly from the elongate support frame. Over the arms and beyond the end of the arms is draped a cover in the form of a plurality of separate cover panels each of which has a central ribbed section and plain edges for overlapping at the arms. The arms are attached to the frame by collars surrounding the frame which collars also support a front sheet which extends downwardly from the frame to a position in contact with the crop. The front sheet is also of plastics material and includes a backing sheet to allow flexing while preventing splitting. The height of the front sheet is arranged so that it contacts the crop and bends it forwardly so the nozzle can spray directly onto the bent crop. The height of the arched cover sheet at the rear edge is arranged to be above the top of the crop to avoid wiping the liquid from the crop.