Mullewa trials - knockdown mixtures on small grass and broadleaf weeds


Research organisaton

Trial details

Researcher(s) Grant Thompson (Crop Circle Consulting)
Year(s) 2010
Contributor North East Farming Futures
Trial location(s) Tenindewa, WA
Mullewa trials - knockdown mixtures on small grass and broadleaf weeds locations

To assess a range of knockdown herbicide mixtures on small grasses and mixed braod leaf weeds.

Key messages
  • Gramoxone at 1.0L/Ha is the best & most cost effective treatment for fast grass control in the short period before sowing
  • If the sprayed grass paddock is left un-sown for several days, the Glyphosate and Boxer Gold treatment proved to have slower visual control but more reliable grass control over the longer period (95%).
  • The high rate of Glyphosate CT (2.0L/Ha) was also quite good at the later time of rating (24DAA), 1.0L/Ha did not provide acceptable control (77%)
  • Rainfall after application would have greatly enhanced the activity of the soil residual herbicides such as Boxer Gold, Sakura and Outlook
  • The possible foliar absorption of Boxer Gold when mixed with Glyphosate made it a clear winner in this trial. It was by far the cleanest treatment at 24 DAA in the absence of tillage. Gramoxone + Sakura(92%) & Gramoxone + Outlook (90%) were very close behind (no tillage).
  • Addition of Logran B Power or Hammer did not improve ryegrass control when mixed with Roundup CT or Gramoxone.
  • Addition of 500ml Alliance to 1.0L Gramoxone may improve broadleaf weed control, particularly small capeweed, but no improvement in grass control.
Lead research organisation North East Farming Futures
Host research organisation N/A
Related program N/A
  • Darren Chitty - Landmark R&D Agronomist
  • Critch Families- Wyalong Pastoral Co – Tenindewa
  • Mullewa Dryland Farming Initiative
  • Conducted by Grant Thompson of Crop Circle Consulting in association with NEFF

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


Crop type No crop specified
Treatment type(s)
  • Herbicide: Type
Trial type Experimental
Trial design Unreplicated

Tenindewa 2010

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

As per trial report

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
Tenindewa, WA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Tenindewa, WA Kandosol
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 Tenindewa WA
2010 77.0mm
2009 86.0mm
2008 119.1mm
2007 90.8mm
2006 74.2mm
2005 80.5mm
2004 57.1mm
2003 56.4mm
2002 50.4mm
2001 30.4mm
2000 99.6mm
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



Derived climate information

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

Tenindewa WA


Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from
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

2010 trial report

Trial last modified: 25-06-2019 11:59am AEST