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Australian Herbicide Resistance Initiative (AHRI)

Perfect storm

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Brome grass

Australian Herbicide Resistance Initiative (AHRI)

Perfect storm

A perfect storm is brewing for what could potentially be another big herbicide resistance problem in Australia. The Group B herbicide sulfosulfuron (Monza®) is about to get a lot cheaper, and many growers are looking to increase their use of Group B Imi tolerant barley and wheat varieties in the near future. Past experience tells us that reducing the price often results in dramatic increases in the use of a given herbicide. This is likely to have a big impact on the evolution of Group B resistance in brome grass and barley grass. AHRI researcher Mechelle Owen found that 13%…

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Man touching a plant

Australian Herbicide Resistance Initiative (AHRI)

How to break glyphosate

To break a herbicide such as glyphosate takes considerable effort. The Americans have broken glyphosate in a big way due to overuse, and Brazil and Argentina are not far behind. As an indication of the scale of the problem, in Arkansas last year over half of the cotton crops were hand weeded before harvest. How did they achieve this amazing feat? In a nutshell, they universally adopted Roundup Ready crops and abandoned almost all other forms of weed control for about a decade. The USA now has the unenviable title of the world’s biggest herbicide resistance problem. You may well…

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