"Double knock" as a tactic for problematic weeds

Date Issued:2008-08-10


Stopping seed-set on weeds that have survived a treatment of glyphosate is an important part of an IWM approach to preventing the development of glyphosate resistance. The double knock method of seed-set prevention to avoid or significantly delay the evolution of glyphosate resistant ryegrass has been used successfully in southern Australia. The double knock tactic involves the use of sequential knockdown herbicide applications from different herbicide mode of action groups. This method has been developed so that survivors of the first herbicide application are controlled by the second

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