Glyphosate-resistant windmill grass foils weed-free fallows

摘要

Glyphosate resistance has been confirmed in windmill grass growing in no-tillage fallow paddocks in central New South Wales, further limiting growers control options of this problematic weed. 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. Windmill grass (Chloris truncata) is a native annual or perennial grass that has become an increasingly invasive weed in summer fallows and along roadsides across Australia. It is becoming more common in fallows due to the widespread adoption of no-tillage farming to conserve soil moisture and reduce erosion risk, which relies heavily on the use of glyphosate.