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Is paraquat resistance possible?

April 26, 2017paraquat possible resistance

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Is paraquat resistance possible?

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Yes. Paraquat & diquat resistance has been confirmed in many barley grass (Hordeum spp.) populations in Australia (see www.weedscience.org). These have mainly come from very intensive paraquat and diquat use in lucerne and some from no-till cropping. Paraquat resistant capeweed and silver grass populations have also been confirmed. There are no confirmed paraquat resistant ryegrass populations in Australia, although paraquat resistant annual ryegrass has been confirmed in vineyards in South Africa. Paraquat, like glyphosate, is regarded as a low risk herbicide for resistance in Australia.