WINDMILL grass from no-till fallow paddocks in central NSW has been confirmed to have developed resistance to the important herbicide glyphosate. Windmill grass joins awnless barnyard grass and liverseed grass as the third weed species confirmed to be glyphosate resistant in the northern grain region since 2007. Dr Chris Preston, University of Adelaide and Chair of the Australian Glyphosate Sustainability Working Group (AGSWG) says this development poses huge threats to no-till farming systems in summer dominant rainfall areas of Australia. "Windmill grass has been an increasing problem in summer fallows across Australia, and the development of glyphosate resistance will make management of this weed even more challenging," he said.
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