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multiple resistance

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Catalogue: Ground Cover
The agronomist from Dubbo, New South Wales, says two years of survey data show herbicide resistance is increasing at an alarming rate across the central western NSW cropping belt and growers need to change tactics urgently to develop effective, long-term weed-management strategies... "In the GOA surveys both ryegrass and black oats demonstrated a high incidence of resistance, with 100 per cent of the ryegrass and 86 per cent of black oats showing resistance to at least one herbicide," Mr Street says... Before growers and agronomists decide on a course of action, Mr Street says it is critical they start testing survivor weed samples so they can map the resistance status of individual farms and paddocks as part of the process to develop effective long-term strategy for the management of hard-to-kill weeds...
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Catalogue: Ground Cover
The agronomist from Dubbo, New South Wales, says two years of survey data show herbicide resistance is increasing at an alarming rate across the central western NSW cropping belt and growers need to change tactics urgently to develop effective, long-term weed-management strategies... "In the GOA surveys both ryegrass and black oats demonstrated a high incidence of resistance, with 100 per cent of the ryegrass and 86 per cent of black oats showing resistance to at least one herbicide," Mr Street says... Before growers and agronomists decide on a course of action, Mr Street says it is critical they start testing survivor weed samples so they can map the resistance status of individual farms and paddocks as part of the process to develop effective long-term strategy for the management of hard-to-kill weeds...
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Catalogue: GRDC Updates (West)
A paddock specific strategy for controlling radish is possible by knowing the resistance genetics present and the stage of resistance development- the expenditure required... We can now describe what is happening within paddocks and can explain why products work or do not work, highlighting the importance of growers knowing what genetics they are dealing with... Best Management Practice is not to rely solely on new chemistries but to use mixtures of both old and new chemistry across populations to minimise selection pressure on all groups...
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Catalogue: GRDC Updates
Approximately 20% of the random survey samples were found to have some resistance to Wildcat, 10% to Topik and 4% to Mataven... There are populations of wild oats that have resistance to all the three modes of actions with selective post-emergence activity... In summary, GR ARG distribution in Australia is best summarised in Table 3...
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Catalogue: GRDC Updates
A paddock specific strategy for controlling radish is possible by knowing the resistance genetics present and the stage of resistance development- the expenditure required... We can now describe what is happening within paddocks and can explain why products work or do not work, highlighting the importance of growers knowing what genetics they are dealing with... Best Management Practice is not to rely solely on new chemistries but to use mixtures of both old and new chemistry across populations to minimise selection pressure on all groups...
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Catalogue: GRDC Updates
A paddock specific strategy for controlling radish is possible by knowing the resistance genetics present and the stage of resistance development- the expenditure required... We can now describe what is happening within paddocks and can explain why products work or do not work, highlighting the importance of growers knowing what genetics they are dealing with... Best Management Practice is not to rely solely on new chemistries but to use mixtures of both old and new chemistry across populations to minimise selection pressure on all groups...
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Catalogue: GRDC Media
Adopting a zero weed seed set policy is a critical component of an integrated management strategy needed to combat wild radish, which has been declared a serious emerging issue in the southern cropping region... "The big message to advisers and growers is manyfold - resistance testing, a thorough understanding of why and how radish has become problematic in any one paddock, and a through appreciation that the seed bank must be managed and a zero seed set policy adopted are all essential components to combating wild radish," Mr Campbell said... Mr Campbell said that over the past 12 years in WA, where intensive cropping systems are more prevalent than in the south, herbicide resistance in wild radish had become more widespread and control notably more complex with the rapid loss of base chemistries...
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Catalogue: GRDC Media
Adopting a zero weed seed set policy is a critical component of an integrated management strategy needed to combat wild radish, which has been declared a serious emerging issue in the southern cropping region... "The big message to advisers and growers is manyfold - resistance testing, a thorough understanding of why and how radish has become problematic in any one paddock, and a through appreciation that the seed bank must be managed and a zero seed set policy adopted are all essential components to combating wild radish," Mr Campbell said... Mr Campbell said that over the past 12 years in WA, where intensive cropping systems are more prevalent than in the south, herbicide resistance in wild radish had become more widespread and control notably more complex with the rapid loss of base chemistries...
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