Black-grass (Alopecurus myosuroides) control across a winter wheat/ winter oilseed rape rotation

摘要

Growers of winter wheat and winter oilseed rape in Southern Britain must do all they can to control black-grass (Alopecurus myosuroides) across the rotation. Propyzamide is a very useful active ingredient in winter oilseed rape, with no black-grass populations reported to exhibit any resistance to the herbicide. Dow AgroSciences Ltd recently launched herbicide products based on the new molecule pyroxsulam for controlling black-grass in winter wheat. With the opportunity to target black-grass controlthroughout a typical winter wheat/winter oilseed rape rotation it is important to understand how to maximise the efficacy of applied herbicides and what impact can be achieved on black-grass seed return to the soil seedbank in subsequent crops. This paper summarises the most recent research conducted with propyzamide and pyroxsulam at a site near Bicester, Oxfordshire, where the effects of herbicide use were measured on black-grass populations across a winter wheat/winter oilseed rape rotation. Used correctly in the rotation, propyzamide and pyroxsulam can reduce black-grass infestations in the current and following crops.