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Herbicide resistance

Glyphosate (the active ingredient in Roundup®) is a herbicide that is used widely around the world and is a valued component of modern agricultural farming systems.

Unfortunately, glyphosate resistance poses a serious threat to the long-term viability of Australian farming systems. Farmers using Roundup Ready Flex® cotton need to implement integrated weed management strategies to ensure that glyphosate continues to be an effective weed control strategy for the whole farming system. For guidelines on how to prevent resistance development in a Roundup Ready Flex crop, have a look at the Weed Resistance Management Plan and Weed Resistance Management Guide.

To assess the risk of developing glyphosate-resistant weed populations on your farm, visit the Queensland Department of Employment, Economic Development and Innovation Glyphosate Resistance Toolkit.

Another information source on glyphosate resistance is the Australian Glyphosate Sustainability Working Group, which promotes the sustainable use of glyphosate in Australian agriculture.

It’s your future


Cotton BaleAll growers must take the time to understand their responsibility to effectively carry out key management practices outlined in the Roundup Ready Flex Weed Resistance Management Plan and the Bollgard® 3  Resistance Management Plan. This will ensure that growers continue to receive the benefits from the technology while minimising the likelihood of resistance development in weeds or insects.

Fallow, in crop, and post crop weed control are very important for successful cotton production.

Growers adopting Roundup Ready technology are encouraged to review their weed management systems to ensure that this technology is being used as part of an overall Integrated Weed Management (IWM) plan.

WeedSmart – promoting the long term sustainability of herbicide use in Australian agriculture

Herbicides have delivered vast improvements in weed control across Australia’s farming systems, conserving moisture, improving yields and boosting profits.

But herbicide use as we know it is under threat. Cases of herbicide resistance are increasing across the northern region as a result of an ongoing reliance on herbicides for weed management in zero and reduced tillage systems, threatening the productivity gains of the past 20 years.

Aware of the growing sense of urgency, Australia’s agriculture industry has united to launch WeedSmart, a new offensive  to curb the spread of resistance to help safeguard Australian farming.

What is WeedSmart?

WeedSmart is an industry-led initiative to tackle the growing problem of herbicide resistance.

Research partners, commercial organisations, Government, advisors and growers have joined forces to ensure weed management is at the forefront of global farming practice.

Visit www.weedsmart.org.au for weed management information, resources and tools including:

  • Case studies – real life examples of what Australian farmers are doing to combat herbicide resistance.
  • Webinars – Learn from leading farmers in the comfort of your own home, on your phone, or even out in the field.
  • 10 point plan – practical tips and tricks to implement these strategies on-farm, and further information on the research to back up these steps.
  • Ask an expert – weed experts answer your questions on herbicide resistance management.
  • WeedSmart App – a simple tool to gauge herbicide-resistance and weed seed bank management.