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resistance evolution

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Catalogue: GRDC Updates
1. Understand the risk for resistance to Sakura and Boxer Gold to evolve in annual ryegrass populations 2... Quantify resistance levels after a few cycles of recurrent selection at below-label rates 3... Results indicate that the resistance level to Boxer Gold further increased in the progeny after one cycle of Boxer Gold selection (Table 2)...
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Catalogue: GRDC Updates (West)
" Understanding resistance evolution to Sakura and Boxer Gold in ryegrass populations Roberto Busi and Stephen Powles, Australian Herbicide Resistance Initiative, School of Plant Biology, UWA Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley, 6009 Western Australia KEYMESSAGES The potential for resistance evolution to Sakura and Boxer Gold has been examined in populations of annual ryegrass ( Lolium rigidum Gaud.)... Rotation of trifluralin, Sakura and Boxer Gold appears to be the most effective measure to delay the evolution of resistance to these herbicides... Results indicate that the resistance level to Boxer Gold further increased in the progeny after one cycle of Boxer Gold selection (Table 2)...
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Catalogue: Ground Cover
Grain producers are being reminded to use the new selective pre-emergent herbicide for wheat pyroxasulfone (Sakura ) responsibly in 2013 to prolong its efficacy against resistant ryegrass... Sakura , a product from Bayer CropScience, is an important resource for controlling ryegrass populations that have already evolved widespread resistance to multiple herbicide modes of action and susceptible ryegrass populations... In a world first, prior to its commercial release in Australia, the Australian Herbicide Resistance Initiative (AHRI) - supported by the GRDC, the Australian Research Council and Kumiai Chemical Industry Co. Ltd - tested whether ryegrass could develop resistance to Sakura ...
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Catalogue: GRDC Final Reports
The maximum potential of collection by baling this material was only 50% of the seed that enters the header... Two different approaches determined that higher temperatures during seed development correlated with greater germinability (less dormancy) when measured at harvest and following five months of after-ripening (Steadman et al. 2004; Steadman & Ellery 2004)... A single batch of seeds will after-ripen faster in the north (e.g. Mullewa) than the south (e.g. Mt. Barker) of the wheat belt due to the temperature difference (Steadman et al. 2003a)...
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