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Controlling annual ryegrass in fencelines to reduce glyphosate resistance development

2014
CC BY 4.0

Research organisations
Funding source
Liebe Group Department of Agriculture and Food WA
<abbr title='Grains Research and Development Corporation'>GRDC</abbr>

Trial details

Researcher(s) Abul Hashem (DAFWA)
Sally Peltzer (DAFWA)
Year(s) 2014
Contributor Liebe Group
Trial location(s) east Buntine, WA
Controlling annual ryegrass in fencelines to reduce glyphosate resistance development locations
Aims

To explore herbicide and application timing alternatives to control annual ryegrass and other weeds on fencelines and prevent the onset of resistance. wns Research Station, Gibson (SEPWA).

Key messages
  • A two spray or double knock strategy (including cultivation or another non-herbicide treatment) is often required for complete control in fencelines with the first application early in the season followed by another one later in the season (after the seeding and post-harvest operations are over).
  • Tank mixes of residual herbicides plus a knockdown give the best control for the first application.
  • A single application of a mixture of Uragan® (bromacil) and paraquat early in the season gives excellent weed control on fencelines.
  • The addition of Alliance® (mixture of amitrole and paraquat) as the knockdown gives good broadleaf control.
  • Glyphosate can still be used but intensive monitoring and complete seed set control is required to prevent resistance from developing.

 

Lead research organisation Department of Agriculture and Food WA
Host research organisation N/A
Trial funding source GRDC
Related program N/A
Acknowledgments

We would like to thank Dave Nicholson, Paul Bartlett and Shari Dougall from DAFWA for their technical support, the Esperance Advisor Group (Phil Smyth, Eric Nankivell, Quenten Knight, Theo Oorschott, John Richardson, Peter Roberts, Holly Swarbrick, Chris Reichstein, Greg Curnow) and the Northern Advisor Group (David Cameron, Geoff Fosbery, Peter Bostock, Helen Lethlean, Chris Wilkins, John Even, Richard Quinlan, Bevan Addison, Rick Horbury, Paul Chatsfield, Bill Campbell, Melissa Welsh, Clare Johnston) for all their input into this trial. Also to the Fitzsimons family for hosting the trial and GRDC for their funding.

For further information, contact Sally Peltzer, DAFWA
sally.peltzer@agric.wa.gov.au
(08) 9892 8504
Other trial partners Australian Glyphosate Sustainability Working Group
Download the trial report to view additional trial information

Method

Crop type Weed: Ryegrass
Treatment type(s)
  • Management systems
Trial type Experimental
Trial design Replicated

east Buntine 2014

Sow date Not specified
Harvest date Not specified
Plot size 10m x 5m
Plot replication 3
Other trial notes
  • A single application of Uragan® (bromacil) plus paraquat in May (or June in Esperance) gave complete control of all weeds at all sites over both rates (350 and 500 kg/ha).
  • Uragan is expensive (see Table 2) but only one application is needed to control all weeds (including summer weeds) for at least one year. There is a risk of soil erosion, as bromacil is highly residual. It is toxic to trees so can only be used where there is no remnant vegetation. Adama™ are continuing trials in 2015 to investigate weed control at lower rates which will reduce the cost and the potential environmental hazards. 
  • At most locations, an application of either simazine + Alliance® or simazine, 2, 4-D and paraquat in May followed by a second application of atrazine and paraquat in August gave better than 95% control. The addition of Alliance gave slightly better control especially where there were broadlea
Download the trial report to view additional method/treatment information
Trial source data and summary not available
Check the trial report PDF for trial results.
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
east Buntine, WA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
east Buntine, WA Sodosol
Soil Moisture Source: BOM/ANU
Average amount of water stored in the soil profile during the year, estimated by the OzWALD model-data fusion system.
Year east Buntine WA
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Climate

Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.

east Buntine WA

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.

Trial report and links

2014 trial report



Trial last modified: 11-12-2019 10:38am AEST