Western Australia
November 23, 2021

Reports of the continued evolution of annual ryegrass herbicide resistance across the country’s major cropping regions has once again reinforced the push for growers to use every possible weed management tool in the proverbial toolbox – and fortunately more tools are coming.
 

Craig White, Leader of Integrated Weed Management in Australia for Bayer, says growers haven’t had the opportunity to selectively target grasses post-emergence in wheat with new chemistry, and thereby improve resistance management, for some time. But he says the new Mateno® Complete herbicide, expected to be registered for use in 2022 also at the incorporated by sowing (IBS) application timing in wheat and barley, would need to be adopted in combination with other key measures.


Recent herbicide resistance testing by the Australian Herbicide Resistance Initiative (AHRI) across four States has indicated continued shifts in sensitivity to different herbicide modes of action and the ongoing requirement for robust management strategies to ensure mode of action groups are not lost to the industry.

Using multiple herbicide modes of action has long been a key plank of the industry’s major measures to help growers delay the evolution of resistance. 

Rotating and mixing multiple herbicide modes of action improves weed control efficacy, particularly of important problem weeds, and helps to increase the lifespan and number of effective applications of herbicides.

The industry is ready to welcome a new three-way mode of action herbicide expected to be registered in time for the 2022 winter cereal season for growers.

Website: http://www.bayercropscience.com.au

Published: November 24, 2021