Effect of sowing time x seed rate x herbicides on brome grass management in wheat

2019
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Ben Fleet
Gurjeet Gill
Contact email gurjeet.gill@adelaide.edu.au
Contact phone 08 83137744
Year(s) 2019
Contributor School of Agriculture, Food and Wine - The University of Adelaide
Trial location(s) Riverton, SA, SA
Effect of sowing time x seed rate x herbicides on brome grass management in wheat locations
Aims

This field trial at Riverton was undertaken to investigate factorial combinations of sowing time, seed rate and herbicides on the management of brome grass in wheat.

Key messages

A field trial was undertaken at Riverton in 2019 to investigate combinations of wheat sowing time, seed rate and herbicide treatments to control brome grass. The average seedbank of brome grass at the site was 1863 ± 303 seeds/m2. Brome grass at this site was effectively controlled (>80%) by delaying sowing by 2 weeks, with treatment effects from herbicide and wheat seed rate treatment only being significant in the early sown plots, where brome grass density was high. These results clearly indicate that brome grass population present at this site has very low seed dormancy and germinates readily after the season opening rains and can be effectively controlled with a knockdown herbicide. Wheat grain yield results reflected the level of brome grass control with herbicide and wheat seed rate treatments improving yields significantly as brome suppression improved. These treatments did not have a significant effect on yield when sowing was delayed because brome was effectively controlled by the knockdown herbicides. In the early sown crop when brome grass was controlled effectively with Intercept®, the 2 week delay in sowing caused a 9% reduction in wheat yield.

Lead research organisation School of Agriculture, Food and Wine - The University of Adelaide
Host research organisation N/A
Trial funding source GRDC 9175134
Related program N/A
Acknowledgments

We thank GRDC for funding this research project and Mark McInerney from Riverton for hosting the trial.


Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop types Weed: Brome grass Cereal (Grain): Wheat
Treatment type(s)
  • Herbicide: Type
  • Sowing: Rate
  • Sowing: Timing
Trial type
Trial design

Riverton, SA 2019 Brome grass

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Psuedoreplication Not specified
Internal notes

Please refer to the attached PDF document for details of Results and Discussion.

Other trial notes

Please refer to the attached PDF document for details of Results and Discussion.

Riverton, SA 2019 Wheat

Sow date 16 May and 31 May
Harvest date Not applicable
Plot size Not specified
Plot replication Not specified
Psuedoreplication Not specified
Internal notes

Please refer to the attached PDF document for details of Results and Discussion.

Other trial notes

Please refer to the attached PDF document for details of Results and Discussion.

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
Riverton, SA, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Riverton, SA, SA Chromosol
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 Riverton, SA SA
2019 250.9mm
2018 320.1mm
2017 405.2mm
2016 373.0mm
2015 331.3mm
2014 358.6mm
2013 334.3mm
2012 366.0mm
2011 418.6mm
2010 381.3mm
2009 346.1mm
2008 297.4mm
2007 342.5mm
2006 352.7mm
2005 375.7mm
2004 337.8mm
2003 340.9mm
2002 343.9mm
2001 402.6mm
2000 406.1mm
National soil grid Source: CSIRO/TERN
NOTE: National Soil Grid data is aggregated information for background information on the wider area
Actual soil values can vary significantly in a small area and the trial soil tests are the most relevant data where available

Soil properties

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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.

Riverton, SA SA

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

2019 trial report



Trial last modified: 20-03-2023 16:24pm AEST