In all cropping systems, it is a common occurrence for unwanted crop plants (volunteers) to germinate on roadsides or other non-cropping areas. Typically however, these volunteers do not become a major weed pest and Roundup Ready canola volunteers are no exception. Compared to conventional canola, Roundup Ready canola poses no threat to the environment or to human and animal safety.
Roundup Ready canola volunteers can be easily controlled using common techniques available for the control of conventional canola. Effective control can be achieved using herbicides labelled to control volunteer volunteers (other than glyphosate) and through, mowing and slashing. Care should be taken with herbicide choice to ensure the herbicides will control brassica weeds and are suitable for the location.
Monitoring needs to be a part of any weed management strategy, including on roadsides. Control activities should be monitored to ensure any emerging plants are controlled early. Survivors of herbicide treatment should be controlled by an alternative method: physical, mechanical or a different herbicide.
You can read more about roadside control and Roundup Ready canola stewardship at http://www.monsanto.com.au/products/canola/grower_info/stewardship.asp.