Biosecurity, pests, weeds and diseases
Control of capweed was obtained using post-emergence in-crop herbicides. Good control was on most of the treatments applied before seeding.
Most products showed good ryegrass control are not usually effective, assume some other factor operating. Treatment usually associated with good ryegrass control have higher ryegrass densities than the treatments using herbicides with only broadleaved variety.
Although large reductions in density of silvergrass were obtained none was significantly better than the unsprayed. Some treatments particularly those favouring grass dominance allowed silvergrass density to build up.
Bromegrass appears to be very sensitive to competition from capeweed. Where there was high capeweed infestations the density of bromegrass was lower.
Number of Pages
Peirce, J R, and Rayner, B J. (1987), Effect of different chemical treatments on capeweed control and crop yield.. Department of Agriculture and Food, Western Australia, Perth. Report.