Weed control in winter oilseed rape

benazolin benazolina brassica napus carbetamida carbetamide cianazina clopyralid cyanazine escarda galium galium aparine gramineae herbicidas herbicide herbicides malezas mauvaise herbe metazachlor papaver piridato poaceae propizamida propyzamide pyridate rape sinapis sinapis arvensis stellaria stellaria media trifluralin trifluralina trifluraline uk weed control weeds