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herbicide efficacy

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 2014 Research Summaries
The Australian grains industry is facing economic loss due to regulation of existing pesticides and associated application due to continued adverse spray drift events and lack of current suitable data to support current best practice... There is also potential increased regulation of pesticide products due to current pesticide use practices and stewardship including residue management and spray drift... Efficacy studies will be conducted on grass and broadleaf weeds using medium and coarse spray qualities so growers will be confident that weed control will be maintained with these sprays...
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Catalogue: GRDC Publications
The stubble management decisions each of these growers made in 2010-2011 were unique to the individual and were influenced by the combination of experiences, cropping systems, agronomic and logistic challenges, and commitment to full stubble retention... The value of grazing crop stubbles to farm profitability was overestimated by the ME value of the intake the value of grazing crops cannot be predicted using energy intake from stubble... Finally the burning of stubbles also contributed to weed 26Australian Glyphosate Sustainability Working Group, Australian Herbicide Resistance Institute (2013), 9 Oct 2013...
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Catalogue: GRDC Publications
H. marinum is widely referred to as sea barley grass around the world, and H. hystrixis known as Mediterranean barley grass... Conditions that favour germination and establishment The seed of common sowthistle can germinate at temperatures in the range 5 C to 35 C. Germination is ultimately determined by moisture availability, as a moist environment is preferred... There is a high proportion of seedling emergence from shallow seed sources, whereas more deeply buried seeds remain dormant and long-lived with a half life estimated at 10 years...
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Catalogue: GRDC Media
In order to maximise the benefits of fallow sprays, Dow AgroSciences' Rob Buttimor says they need to be managed to the same degree as in-crop sprays so growers do not end up with a mess in the spray tank... "Growers using 2 percent AMS in soft water are effectively wasting their money," Mr Buttimor says... By adding lots of other ions to the spray tank in the form of hard water or soluble liquid herbicides, it neutralizes these charges and the oil droplets can come together to form large oil droplets, oily gels or general glug that will float to the top or sink to the bottom of the spray tank...
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Catalogue: GRDC Media
In order to maximise the benefits of fallow sprays, Dow AgroSciences' Rob Buttimor says they need to be managed to the same degree as in-crop sprays so growers do not end up with a mess in the spray tank... "Growers using 2 percent AMS in soft water are effectively wasting their money," Mr Buttimor says... By adding lots of other ions to the spray tank in the form of hard water or soluble liquid herbicides, it neutralizes these charges and the oil droplets can come together to form large oil droplets, oily gels or general glug that will float to the top or sink to the bottom of the spray tank...
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Catalogue: GRDC Final Reports
Interim solutions have been developed and communicated to growers for difficult to control weeds, weed management in wide-row cropping, and technology to maximise herbicide efficacy in sub-optimal environments... The effects of the speed of application were also investigated and it was found that regardless of the speed (10, 15 or 20km/h) or droplet spectrum used (coarse, very coarse, or extremely coarse) no detrimental effect on the level of weed control achieved in the trial could be seen, although further research is required to validate this... Results and outcomes from all trials and research conducted in this project have been shared and discussed with growers and agronomists using a variety of media - shed meetings, field days, open days, adviser and grower updates, newsletters, grower magazines, newspapers and conferences...
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Catalogue: GRDC Media
Early warm weather and storm events have meant conditions are ideal for a flush of summer weeds and the Grains Research and Development Corporation (GRDC) is urging growers to control summer fallow weeds early to maximise effectiveness, preserve precious stored soil moisture and protect the yield potential of future crops... " efficacy is also significantly impacted by temperature and humidity, travel and wind speed, droplet size and viscosity of spraying liquid so it's really important from a cost/benefit and sustainability perspective to adhere to best management recommendations on spray equipment and conditions.".. Pre-emergent herbicides are becoming increasingly used in integrated weed management programs as advisors and growers look to alternative modes of action for hard-to-kill weeds and an increasing range of weeds with resistance to post-emergent herbicides...
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Catalogue: GRDC Media
Early warm weather and storm events have meant conditions are ideal for a flush of summer weeds and the Grains Research and Development Corporation (GRDC) is urging growers to control summer fallow weeds early to maximise effectiveness, preserve precious stored soil moisture and protect the yield potential of future crops... " efficacy is also significantly impacted by temperature and humidity, travel and wind speed, droplet size and viscosity of spraying liquid so it's really important from a cost/benefit and sustainability perspective to adhere to best management recommendations on spray equipment and conditions.".. Pre-emergent herbicides are becoming increasingly used in integrated weed management programs as advisors and growers look to alternative modes of action for hard-to-kill weeds and an increasing range of weeds with resistance to post-emergent herbicides...
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