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Catalogue: GRDC Media
Resource can help growers plan for summer spraying.. "Often the most important factor in summer weed control is getting the timing right and using a robust rate of product," Dr Hughes said... Dr Hughes said that with legal pressure on night spraying - due to the presence of surface temperature inversions - South Australian trials tested the control of 'tough weeds' in less than favourable conditions during summer daytime spraying...
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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 Media
Multiple herbicide resistance in weeds poses a bigger problem than glyphosate resistance in Australian and global cropping systems, and the only way forward is diversity in weed control practices... "There are more than 60 countries where scientists are reporting herbicide resistant weeds and lately we have seen a big problem with weeds resistant to many different types of herbicides," he said... Dr Heap said the problem of multiple herbicide resistance in weeds was compounded by a lack of discovery of new herbicides with alternative modes, or sites of action (MOA) in recent years...
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Catalogue: GRDC Media
Multiple herbicide resistance in weeds poses a bigger problem than glyphosate resistance in Australian and global cropping systems, and the only way forward is diversity in weed control practices... "There are more than 60 countries where scientists are reporting herbicide resistant weeds and lately we have seen a big problem with weeds resistant to many different types of herbicides," he said... Dr Heap said the problem of multiple herbicide resistance in weeds was compounded by a lack of discovery of new herbicides with alternative modes, or sites of action (MOA) in recent years...
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Catalogue: GRDC Media
Resource can help growers plan for summer spraying.. "Often the most important factor in summer weed control is getting the timing right and using a robust rate of product," Dr Hughes said... Dr Hughes said that with legal pressure on night spraying - due to the presence of surface temperature inversions - South Australian trials tested the control of 'tough weeds' in less than favourable conditions during summer daytime spraying...
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Catalogue: GRDC Factsheets
Target young, small weeds (seedlings and young rosettes); herbicide efficacy decreases as flaxleaf fleabane matures... Widespread use of glyphosate in both agricultural and non-agricultural sectors has caused glyphosate resistance in this weed... Field experiments have shown the overall efficacy of 11 Group I and Group B herbicides was substantially reduced when spraying was delayed by two weeks...
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Catalogue: GRDC Factsheets
Target young, small weeds (seedlings and young rosettes); herbicide efficacy decreases as flaxleaf fleabane matures... Widespread use of glyphosate in both agricultural and non-agricultural sectors has caused glyphosate resistance in this weed... Field experiments have shown the overall efficacy of 11 Group I and Group B herbicides was substantially reduced when spraying was delayed by two weeks...
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Catalogue: GRDC Factsheets
Target young, small weeds (seedlings and young rosettes); herbicide efficacy decreases as flaxleaf fleabane matures... Widespread use of glyphosate in both agricultural and non-agricultural sectors has caused glyphosate resistance in this weed... Field experiments have shown the overall efficacy of 11 Group I and Group B herbicides was substantially reduced when spraying was delayed by two weeks...
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Catalogue: GRDC Final Reports
Undertaking four case studies of farmers who have successfully managed herbicide resistance... Using the double knock approach where glyphosate is used first, then followed by paraquat # or Spray... Crop choice and herbicide use influenced ryegrass seed-set and subsequent numbers in the following crop...
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Catalogue: GRDC Updates (West)
The cross resistance profile to pre-emergence herbicides has been examined in a multi-resistant population of annual ryegrass after pyroxasulfone recurrent selection... Recurrent selection with pyroxasulfone at below-label doses has resulted in pyroxasulfone resistance and cross-resistance to prosulfocarb and triallate... We suggest that herbicide rotation at the full label rate of prosulfocarb, pyroxasulfone, triallate and trifluralin in conjunction with weed seed control at harvest is currently the most sustainable solution for pre-emergence herbicide control of annual ryegrass in cereals...
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