Polymeria take-all is a native Australian plant which is particularly troublesome throughout the Australian cotton industry because it is difficult to control. For example, shallow chipping once per month for four months increased the dry weight production of Polymeria take-all shoots but not cotton production. Again, single applications of glyphosate and Starane, while decreasing the shoot growth of Polymeria take-all, did not increase cotton yields. In contrast, repeated severe defoliation performed under non-irrigated conditions reduced the growth of shoots and rhizomes of Polymeria take-all in an uncultivated area trial. These results have been used to help develop best management practices for Polymeria take all control which will include prevention, herbicide application, cultivation and field hygiene