Polymeria takeall, or Peak Downs curse, is a deep rooted, rhizomatous, perennial weed which spreads from seeds and rhizomes. It tolerates cultivation and can be spread by cultivation. In-crop it can best be managed with repeated, heavy applications of glyphosate on actively growing polymeria, applied through well constructed shields. Good crop agronomy is also important, resulting in competitive, strong cotton. Polymeria in fallow can be controlled with glyphosate on actively growing patches and with Starane in autumn. Heavy rates of Arsenal may be useful on waste areas.