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annual ryegrass

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Catalogue: GRDC Media
Frost puts freeze on effectiveness of ryegrass herbicide.. "Ideally, spray small ryegrass plants under warmer and frost-free periods for the best results with clethodim on ryegrass," said Dr Gill when addressing a GRDC Grains Research Update in Campbell Town, Tasmania, on the topic of controlling herbicide-resistant annual ryegrass in canola crops... We want the ryegrass to be actively growing and stress-free for clethodim to do the best job, so growers need to watch the weather forecasts closely to determine the best time to spray," Dr Gill said...
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Catalogue: GRDC Updates (South)
03 5441 6176 03 5444 4299 admin@orm.com.au CAUTION: RESEARCH ON UNREGISTERED PESTICIDE USE Any research with unregistered pesticides or of unregistered products reported in this document does not constitute a recommendation for that particular use by the authors, the authors' organisations or the management committee... In summary, it could be argued that none of the currently available preemergence herbicides have the required stability in efficacy to become viable alternatives to postemergence group A or imidazolinone herbicides... Overall, 2012 seasonal conditions tended to favour early and mid flowering and maturing varieties...
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Catalogue: GRDC Publications
The results of the experiments have given Jeff the confidence to realise that he does have a viable, cost-effective alternative knockdown herbicide to glyphosate... Double knockdown (T 2.2b, page 128) Weather permitting, a double knockdown is implemented on resistant ryegrass paddocks prior to sowing using two non-selective herbicides (glyphosate followed by paraquat + diquat or paraquat, the choice being dependent upon the range of weeds present)... Helpful advice The Grays still enjoy the challenges and can see that they have made enough progress to feel they are being successful in managing a serious annual ryegrass problem...
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Catalogue: GRDC Updates
Survival of annual ryegrass plants collected at various distances into the crop to different rates of glyphosate (where glyphosate rates are measured as glyphosate applied in gram active ingredient per hectare).. In order to identify alternative herbicide controls for growers who prefer a herbicide option to other management practices, we conducted two field experiments to assess the effect of glyphosate mixtures and other herbicide mixtures in controlling glyphosate resistant annual ryegrass on some fence lines in South Australia... Alternative herbicides for control of glyphosate resistant annual ryegrass on fence lines Two sites were used for this experiment: Ungarra on the Eyre Peninsula and Hilltown near Clare...
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Catalogue: Ground Cover
Dr Hashem says a rotation of wheat/lupins or lupins/wheat followed by Roundup Ready (RR) canola and use of alternative herbicides with diverse modes of action were the keys to success... Dr Hashem says the trial compared row spacings of 22 and 44 centimetres and found that any moisture conservation benefit from using wider rows at the Cunderdin site was offset by reduced crop establishment (by 20 to 25 per cent on average for all crop types) and weed-control failure... Dr Hashem says that the use of Flexi N reduced canola establishment in both 22 and 44cm row spacing plots compared with urea, but increased canola crop vigour by 15 per cent and grain yield by 12 per cent...
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Catalogue: Ground Cover
Dr Hashem says a rotation of wheat/lupins or lupins/wheat followed by Roundup Ready (RR) canola and use of alternative herbicides with diverse modes of action were the keys to success... Dr Hashem says the trial compared row spacings of 22 and 44 centimetres and found that any moisture conservation benefit from using wider rows at the Cunderdin site was offset by reduced crop establishment (by 20 to 25 per cent on average for all crop types) and weed-control failure... Dr Hashem says that the use of Flexi N reduced canola establishment in both 22 and 44cm row spacing plots compared with urea, but increased canola crop vigour by 15 per cent and grain yield by 12 per cent...
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Catalogue: GRDC Updates (West)
After 12 years of continuous glyphosate application, herbicide resistance testing carried out on four populations of annual ryegrass showed confirmed resistance to glyphosate... Plant survival of annual ryegrass collected in 2011 from plots selected with annual application of glyphosate at 270 g ai/ha or 1080 g ai/ha at 3-leaf stage of ryegrass plants, following application of different rates of glyphosate (e.g., Roundup PowerMAX ) under glasshouse conditions at Northam in 2012... The overall survival of annual ryegrass when treated with a dose greater than 540 g ai/ha was higher in plants collected from plots selected with 270 g ai/ha glyphosate at 3-leaf stage than plots selected with 1080 g ai/ha...
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Catalogue: Ground Cover
Ryegrass resistance survives the double knockdown.. Using a double knockdown (glyphosate followed by a paraquat 'second knock') will not prevent ryegrass developing resistance to glyphosate... "Perhaps the simplest strategy to slow down the onset of resistance is to avoid bringing the three drivers together - intensive use of glyphosate, little or no tillage and no other effective herbicide," says Dr Preston...
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