New advice on herbicide resistance
June 27, 2012
With herbicide resistance threatening the future of the no-till farming system, the Grains Research and Development Corporation (GRDC) is keeping growers up to date with the latest information for tackling the issue.
This includes a new fact sheet for northern region grain growers, Herbicide Resistance. Cropping with herbicide resistance, which is available for download at www.grdc.com.au.
Dr Rohan Rainbow, GRDC senior manager plant health says herbicide resistance is spreading through the northern grains region.
“Integrated weed management can delay or prevent resistance developing by relying on a range of tactics, both chemical and non-chemical, to keep weeds successfully in check,” Dr Rainbow said.
Key points from the fact sheet include:
- Resistance develops when repeated applications of the same mode-of-action (MOA) herbicide kill susceptible weeds, and resistant weeds survive and set seed.
- Herbicide resistance will remain as long as there is resistant seed in the soil.
- Integrated weed management (IWM) is a diverse approach using chemical, non-chemical and agronomy tactics that targets weed seed-set. It is the best way to delay or prevent the development of herbicide resistance.
- Minimising the number of weed seeds in the soil (the seedbank) by preventing weeds from setting seed is the top priority.
- Herbicide-resistant weeds are always possible, whether they occur naturally or are introduced via wind, water or contamination. However, consistently applying IWM will achieve a relatively weed-free system.
For more information on GRDC-supported herbicide resistance research, visit www.grd.com.au/weedlinks.
More solutions from: GRDC (Grains Research & Development Corporation)
Published: June 27, 2012