Weeds’ resistance to common herbicides measured

At least seven species of weed have evolved to resist the most commonly used weed killers in Queensland’s wheat and sorghum industry.

A three-year research project by the University of Queensland found that turnip weed, climbing buckwheat, African turnip weed and liverseed grass were able to resist herbicides.

The study investigated 17 weed species frequently found in Queensland’s north-east grain area and how they reacted to herbicides from three chemical groups: clodinafop-propargyl, chlorsulfron and atrazine.

Resistance was found to develop after five years exposure to clodinafop-propargyl, three to chlorsulfron and two to 15 years to atrazine.

Read more at The University of Queensland