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Catalogue: GRDC Updates
Field trials undertaken over the last 4 years have investigated various pre-emergence herbicides for brome grass control in wheat... In a recent survey by Fleet and Gill (2008), farmers in low rainfall districts in South Australia and Victoria reported increasing incidence of barley grass in their crops... In the paper we will report results of studies undertaken to develop management strategies for brome and barley grass...
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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: Ground Cover
Brome grass needs multi-pronged attack.. When herbicides are put under pressure resistant weeds are quickly selected for, such as this population of brome grass... Break crops need to be employed with other management tools including: high seeding rates at sowing for improved competition with brome grass plants; effective herbicide choice with correct rates, droplet size and timing; regular resistance testing if herbicide failure is suspected; retaining or sourcing clean seed for future use; and monitoring brome grass levels in all paddocks while planning future use...
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Catalogue: GRDC Media
Australian cereal growers adopting harvest weed seed control systems (HWSC) are driving down weed populations to lower levels on their farms, and extending the life of the herbicides they use... Dr Walsh said the problem of herbicide resistant weed populations globally was particularly severe in production systems where herbicide dependence resulted in a lack of weed control diversity... "Although herbicides remain the number one weed control tool in Australian cropping systems, it is now clear that the inclusion of HWSC systems in weed management programs is enabling weed populations to be driven to very low levels, providing some insurance for the sustainability of remaining herbicide resources," he said...
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Catalogue: GRDC Media
As a grain grower near Mingenew in the Geraldton port zone I'm well aware of the threat posed by wild radish to the financial viability of growers in my region... Recognising the problem, collaborative local research has been conducted investigating herbicidal control of wild radish, and the results will provide guidance to Western Australian growers this season... After identifying wild radish as the main priority for funding in 2012, the research - involving a number of researchers and farm advisers - set about trying to find new herbicide tankmixes for wild radish control as an alternative to using the newer herbicides such as Velocity (bromoxynil and pyrasulfotole) twice in a growing season...
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Catalogue: Ground Cover
More information: Australian Glyphosate Sustainability Working Group, www.glyphosateresistance.org.au - By Sharon Watt.. The GRDC is urging growers to be on the lookout for any weeds that should be controlled by glyphosate but which survive... "This is a huge concern to Australian grain growers because this highly competitive weed has been becoming a major problem in reduced-tillage farming," says Associate Professor Chris Preston, chair of the Australian Glyphosate Sustainability Working Group and leader of the University of Adelaide team that confirmed the result...
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Catalogue: Ground Cover
More information: Australian Glyphosate Sustainability Working Group, www.glyphosateresistance.org.au - By Sharon Watt.. The GRDC is urging growers to be on the lookout for any weeds that should be controlled by glyphosate but which survive... "This is a huge concern to Australian grain growers because this highly competitive weed has been becoming a major problem in reduced-tillage farming," says Associate Professor Chris Preston, chair of the Australian Glyphosate Sustainability Working Group and leader of the University of Adelaide team that confirmed the result...
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Catalogue: Ground Cover
Northern region Grains Research Updates coordinator John Cameron reflects on the vast changes that researchers and growers have implemented over the past two decades, and the one problem that just will not go away - weeds.. No-till has become crucial to northern grains production but faces a major weed-control challenge... In the short term, the no-till system will be defended by tactics such as pre-emergent herbicides, double knock using paraquat, and the use of tillage when weeds cannot be or are uneconomical to control using herbicides...
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Catalogue: GRDC Media
Residual herbicides have become an important tool in the war against weeds for many northern region growers in recent years... Growers are urged to carefully consider their plant-back options for the 2014 winter season in country previously treated with in-crop or fallow residual herbicides as label recommendations for replant intervals usually require a minimum amount of rainfall to kick-start breakdown of the residual herbicide... To determine what crop can be safely sown following a residual herbicide application growers need to calculate the herbicide rate, quantify the amount of rainfall from the date of application up until sowing the plant back crop (excluding isolated storm events during summer) and carefully consult product label recommendations...
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Catalogue: GRDC Media
Glyphosate resistance survey finds SA growers at risk.. The random survey, conducted by the University of Adelaide and funded by the Grains Research and Development Corporation (GRDC), has shown it is time for farmers to make significant changes to weed management to halt this problem... "We knew there was some glyphosate resistance in the area from previous work," stated Associate Professor Chris Preston of the University of Adelaide and project leader, "but this surprised all of us and has set the alarm bells ringing to bring in changes to weed management...
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