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herbicide resistance

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Catalogue: GRDC Updates (West)
Mention of a trade name or company in this publication does not imply endorsement of any product or company by the Department of Agriculture and Food, Western Australia... Overall, 60-70 per cent of flour is used in traditional flat breads, 20-25 per cent of flour is used in western style breads and 5-10 per cent is used in cakes and biscuits... In summary, canola varieties sown 2-3 weeks earlier than normal (early to mid April) can be grazed in winter prior to bud elongation (usually providing 600-800 dse grazing days/ha) and recover with no impact on yield or oil...
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Catalogue: GRDC Media
SA sowthistle populations confirmed resistant to 2,4-D.. Resistance to the Group I herbicide 2,4-D in sowthistle has been confirmed in South Australia... A major weed of cropping systems north of Dubbo in New South Wales for more than 15 years, sowthistle is now considered a significant emerging weed in southern and western farming systems and will be a focus of the Grains Research and Development Corporation's project on the evolution mechanisms and inheritance of herbicide resistance being led by Dr Chris Preston who is based at the University of Adelaide...
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Catalogue: Ground Cover
To Keep your herbicides: stop survivors from setting seed.. Keeping weeds 'off-balance' by mixing up controls and keeping their numbers low is the aim of integrated weed management (IWM), where different practices are combined to prevent weeds from adapting to a single control option... The interactive, one-day grower workshops focus on how to manage weed populations and ensure that herbicide resistance does not dictate how they farm...
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Catalogue: Ground Cover
To Keep your herbicides: stop survivors from setting seed.. Keeping weeds 'off-balance' by mixing up controls and keeping their numbers low is the aim of integrated weed management (IWM), where different practices are combined to prevent weeds from adapting to a single control option... The interactive, one-day grower workshops focus on how to manage weed populations and ensure that herbicide resistance does not dictate how they farm...
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Catalogue: GRDC Updates
Michael Walsh and Stephen Powles, Australian Herbicide Resistance Initiative, Implications of intercepting weed seed at harvest.. Without inputs a very large seed bank (>1000 seed/m2) can be reduced to a very modest one (<100 seed/m2) in just four years... The collection and management of the weed seed bearing chaff fraction can result in significant reductions in annual weed population densities...
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Catalogue: GRDC Updates
Growers that have the weed seed bank under control will save herbicide costs; be able to use diverse tactics that would otherwise be cost prohibitive; and, by reducing the frequency of herbicide applications, will delay the onset of herbicide resistance... With any discussion on managing resistance we need to start with the basics and understand why we have the problem in the first place... Registration of high application rates by this technique may allow the control of resistant weeds that have survived a preceding application of a different mode of action...
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Catalogue: GRDC Media
A survey of farmer paddocks across the Western Australian grainbelt has confirmed a big increase in the level of herbicide resistance in wild radish to commonly used Group B selective herbicides... Details of current levels of herbicide resistance in wild radish will be outlined at this month's Agribusiness Crop Updates, which are supported by the Grains Research and Development Corporation (GRDC) and the Department of Agriculture and Food (DAFWA)... Ms Owen said that while glyphosate, atrazine and pyrasulfatole/bromoxynil (Velocity ) were still effective in most cases, growers should not rely on herbicides alone to manage wild radish and other weeds, and should also consider the use of non-chemical methods for weed control...
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Catalogue: GRDC Media
The new Gunnedah population on the left looks healthy, showing it has a much higher level of resistance compared to the sample in the centre which is known to be susceptible, and the original resistant Moree population on the right... The world's third case of glyphosate resistant liverseed grass has been confirmed in northern New South Wales, seven years after the first two cases were confirmed from east of Moree... "While this is only the third confirmed case of glyphosate resistant liverseed grass in seven years, it comes from a new area and has a much higher level of resistance than previous populations," stated Tony Cook, Technical Specialist (Weeds) with NSW Department of Primary Industries...
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Catalogue: GRDC Media
Mr Congreve said planning a coordinated and effective strategy to control in-crop and fallow weeds, particularly problem grassy weeds, would help growers maximise crop yields while delaying the development of resistance on the farm... The second webinar on December 10 will address the latest research on barnyard grass management through the experience of respected industry experts Tony Cook from NSW Department of Primary Industries (NSW DPI) and Michael Widderick and Jeff Werth from the Department of Agriculture, Fisheries and Forestry (DAFF Queensland) who have been extensively studying the ecology, evolution of resistance and management of barnyard grass in fallow and summer crops... Caption: Mark Congreve, Senior Consultant ICAN says planning a coordinated and effective in-crop strategy to control weeds, particularly problem grassy weeds, would help growers maximise crop yields while reducing the likelihood of developing a herbicide resistance problem on-farm...
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Catalogue: Ground Cover
A range of options is needed for effective summer weed control.. All these summer weeds have populations that are either resistant to glyphosate or naturally tolerant of glyphosate (such as feathertop Rhodes grass).. The weeds in question - awnless barnyard grass, feathertop Rhodes grass (FTR), windmill grass, liverseed grass, sowthistle and the notorious fleabane - are all a problem in summer fallows: "And all have populations either resistant to glyphosate or naturally tolerant to glyphosate (such as FTR)...
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