Pre-emergent herbicides lose the battle to control annual ryegrass in the high rainfall zone

2015
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Paul Breust (SFS)
Corinne Celestina (SFS)
Gurjeet Gill (UoA)
Christopher Preston (LaTrobe Uni)
Aaron Vague (SFS)
Year(s) 2015
Contributor Southern Farming Systems
Trial location(s) Lake Bolac, VIC
Pre-emergent herbicides lose the battle to control annual ryegrass in the high rainfall zone locations
Aims

To assess the effectiveness and applicability of cultural control practices in combination with pre-emergent herbicides for the management of herbicide resistant annual ryegrass in the high rainfall zone of Victoria.

Key messages
  • Continuous cropping is not an effective way to manage herbicide resistant annual ryegrass over the long term in the high rainfall zone.
  • The increase in weed numbers over time can be slowed by adopting an intensive and high cost herbicide strategy, but not enough to reduce soil weed seed bank.
  • Increasing annual ryegrass density by 100 seed heads per square meter was associated with a 150 kg/ha decrease in grain yield. 
Lead research organisation Southern Farming Systems
Host research organisation N/A
Trial funding source GRDC UA00149
Related program N/A
Acknowledgments

This project has been co-funded by the University of Adelaide and GRDC (UA00149). Thanks to Neil Vallance for hosting the trial site and to Andrew Whitlock from Precision Agriculture. Thanks to SFS staff and casuals, past and present, who assisted in the trial. 


Other trial partners La Trobe University and University of Adelaide
Download the trial report to view additional trial information

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Herbicide: Timing
Trial type Experimental
Trial design Replicated

Lake Bolac 2015

Sow date 17 April 2015
Harvest date 31 December 2015
Plot size Not specified
Plot replication Not specified
Herbicide

A (low cost) - Trifluralin at 3L/ha + Avadex Xtra at 1L/ha + Dual Gold at 0.25L/ha IBS

 

B (mid cost) - Sakura 118g/ha IBS 

 

C (high cost) - Sakura 118g/ha + Avadex Xtra 2L/ha IBS

and Boxer Gold 2.5L/ha at GS 11

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
Lake Bolac, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Lake Bolac, VIC 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 Lake Bolac VIC
2015 470.1mm
2014 485.1mm
2013 478.1mm
2012 507.9mm
2011 532.6mm
2010 532.7mm
2009 476.1mm
2008 477.4mm
2007 474.0mm
2006 461.2mm
2005 491.3mm
2004 474.1mm
2003 482.7mm
2002 463.3mm
2001 466.9mm
2000 459.2mm
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

Lake Bolac VIC 2015


Observed climate information

Rainfall avg ann (mm) 538.2mm
Rainfall trial total (mm) 386.2mm

Derived climate information

Lake Bolac VIC

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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

2015 trial report



Trial last modified: 20-10-2019 11:46am AEST