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Catalogue: GRDC Media
Group I resistance found in NSW wild radish.. "We know from the Western Australian experience that once you reach about 20 years of use of Group I chemicals in wild radish, resistance will begin to develop... Representatives from the NSW Department of Primary Industries (NSW DPI) have been scouting crops across the state for the past two years for broadleaf weed survivors in species such as wild radish, sow thistle, fleabane and the mustard weed species...
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Catalogue: GRDC Media
"We know from the Western Australian experience that once you reach about 20 years of use of Group I chemicals in wild radish, resistance will begin to develop... Representatives from the NSW Department of Primary Industries (NSW DPI) have been scouting crops across the state for the past two years for broadleaf weed survivors in species such as wild radish, sow thistle, fleabane and the mustard weed species... The discovery of Group I resistance heralds the need for changes in on-farm weed management practices and Mr Brooke said growers needed to rethink their approach to control or risk further resistance problems in phenoxy modes of action...
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Catalogue: GRDC Updates
Early vigour is closely related to lentil yield... Factors that determine the safety of the post sowing pre-emergent (PSPE) application include; lentil variety tolerance, sowing depth, chemical type, soil moisture at the time of sowing and rainfall received after application... The use of OnDuty, Glean, Ally and Crusader at the PSPE timing should be avoided due to the significant yield loss measured in this trial...
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Catalogue: GRDC Media
While winter conditions have now arrived in the north, an unusually warm June prompted a rapid growth response in wheat crops and weeds, forcing growers to implement weed control strategies early and effectively to avoid problems as the season progresses... Planning a coordinated and effective in-crop strategy to control weeds, particularly problem grassy weeds like wild oats, will help growers maximise crop yields while reducing the likelihood of developing a herbicide resistance problem on-farm... In cases where resistance status of weed outbreaks is known or there have been problems in the past with the efficacy of Group A chemicals, growers should consider rotating to a 'den' Group B herbicide or a combination of Groups A and B herbicides, with the aim of using only one Group B chemical within three years...
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Catalogue: GRDC Media
While winter conditions have now arrived in the north, an unusually warm June prompted a rapid growth response in wheat crops and weeds, forcing growers to implement weed control strategies early and effectively to avoid problems as the season progresses... Planning a coordinated and effective in-crop strategy to control weeds, particularly problem grassy weeds like wild oats, will help growers maximise crop yields while reducing the likelihood of developing a herbicide resistance problem on-farm... In cases where resistance status of weed outbreaks is known or there have been problems in the past with the efficacy of Group A chemicals, growers should consider rotating to a 'den' Group B herbicide or a combination of Groups A and B herbicides, with the aim of using only one Group B chemical within three years...
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