Double knock to preserve glyphosate

What’s better than an attack on weeds? A second one. Come at them with a different strategy and any survivors left over don’t stand a chance, that’s the beauty of the double knock.

Controlling herbicide-resistant weeds is essentially all about double knocks. This can be one herbicide followed by another, or it could be a herbicide followed by a non-herbicide tool (e.g. the ‘Canola Combo’ – crop top followed by harvest weed seed control). All that really matters is any resistant survivors to the first herbicide are hit with another control measure so that the weeds don’t set seed.

And then there is the double knockdown. Glyphosate followed by paraquat (or paraquat + diquat). Glyphosate resistance is such a big deal it gets its own, specific weed control strategy. Glyphosate is the world’s most important herbicide and nothing else comes close as a low cost, reliable knockdown, so we really need to look after it.

Australian Glyphosate Sustainability Working Group

With investment from the Grains Research and Development Corporation, the Australian Glyphosate Sustainability Working Group was established. 

After guiding growers and agronomists through a critical 15 years of managing glyphosate resistance in Australia the AGSWG has been disbanded, however the work of advising farmers and other weed managers continues. Find key factsheets on glyphosate management.

Podcasts

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S07E06: Regional Update – Lance Turner, Farmer, East Pingelly, WA

East Pingelly grain farmer Lance Turner joins us on the Regional Update podcast and says it's a great time to consider a double knock. Read More...
Audio
Podcast

S07E05: Adapting spray tactics from summer to autumn pays off

On this edition of the podcast, we’re focusing on getting spraying right. As we move from Summer to Autumn, it’s a good time to consider what spray practices are being implemented and to consider what practical changes might be worthwhile. Read More...
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Podcast

S06E40: Regional Update – Bernie Quade, Agronomist, Wyalkatchem, WA

In this Regional Update, we catch up with Nutrien Agronomist, Bernie Quade who is based in Wyalkatchem, Western Australia. Read More...

Videos

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Rod Birch on how the Big 6 is keeping weeds at bay at Catalina Farms

Rod Birch (Coorow, WA) gives an overview of what Big 6 principles are working for them. He also explas how they're approaching weed control at new property acquisition, 'Koobabbie', which hadn't changed hands for 115 years. Read More...
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Video

WeedSmart Week Forum Day Videos

Watch all the videos from our Esperance WeedSmart Week Forum Day! Read More...
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Webinar

What’s next in the North for weed control?

Agronomists Peter McKenzie and Angus Dalgliesh discuss the weed control tactics their clients have been using to deal with their weed challenges.  Read More...

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