Glyphosate resistant ryegrass on roadsides

We’ve recently heard from some concerned landholders in the region about suspected glyphosate (RoundUp) resistant weeds on roadsides, including annual ryegrass and feathertop rhodes grass.

Glyphosate resistance in annual ryegrass caused alarm to Australian growers when it was first reported in 1996. It is no longer considered rare, however effectively managing resistant weeds remains key to glyphosate stewardship.

If you see a few plants remaining green among others that appear to have been killed by herbicide application, you may be looking at resistant weeds. If it’s in your paddock, this can be confirmed with a herbicide resistance test. If it’s on public land, you can let the relevant land manager know.

A quick way to let local council know of issues is through the Snap Send Solve App.

Continuing to treat weeds with a herbicide they have resistance to will not achieve the desired aim, and can result in unnecessary chemical use and inefficient use of funds.

More info here: Roadside Weed Management Factsheet

Have you seen any around? Let us know!