to investigate the efficacy of knockdown mixes and timings on the control of ryegrass and broadleaf weeds prior to cropping.

This demonstration investigated knockdown weed control options prior to sowing. For the knockdown control of ryegrass, canola and wild radish prior to sowing, glyphosate is quite effective and no additional herbicides are generally required. Glyphosate is weak on marshmallow and a group G herbicide is required as a mix with the glyphosate. To reduce the risk of group M (glyphosate) resistance developing in ryegrass it is strongly recommended to use the ‘double knock’ approach (glyphosate followed four to seven days later by SpraySeed®) on at least some paddocks every year.