Biosecurity, pests, weeds and diseases
Significant yield increases were obtained by applying chemicals pre-sowing to control capeweed. Time of spraying also had a significant effect on crop yield. Best yields were obtained from the treatment four weeks before seeding.
Good capeweed control (four weeks before seeding) may have been due to the condition of the weeds. Prior to spraying 50 mm of rain was recorded and may have freshened up the capeweed making it more susceptible to the chemical.
Number of Pages
Peirce, J R, and Rayner, B J. (1987), Effect of time of spraying prior to seeding for capeweed control.. Department of Agriculture and Food, Western Australia, Perth. Report.