Mullewa trials - herbicide options to control button grass during summer


Research organisaton
Funding source

Trial details

Researcher(s) Grant Thompson (Crop Circle Consulting)
Year(s) 2011
Contributor North East Farming Futures
Trial location(s) Tenindewa, WA
Mullewa trials - herbicide options to control button grass during summer locations

To assess herbicide options to control button grass during summer.

Key messages
  • Of the herbicides tested, Glyphosate is the most cost effective and reliable herbicide. ‘FOP’ grass selectives appeared to give poor control at the rates used on mature button grass. Intervix appeared to give poor results at the rates used on mature grass.
  • A tankmix of Glyphosate with other broadleaf and melon herbicides reduced control by 13% at 17 days after spraying. Spraying in the dark appeared to give the best control, spraying in the early morning daylight gave no significant improvement in control.
  • Choice of adjuvant proved important, with LI700 and Amsul giving the best performance by 17 days after application. The use of Hot-Up oil and Supercharge oil + Amsul gave slightly poorer control of Button Grass. Paraquat at 1L & 2L/Ha and Alliance at 3L/Ha achieved impressive initial burndown at 10 days, but weed regrowth occurred shortly after and was unacceptable at 17 Days after application.


Lead research organisation North East Farming Futures
Host research organisation N/A
Trial funding source North East Farming Futures (NEFF)
Related program N/A
  • Brendan and Kevin Weir – for hosting trial site.
  • Grant Thompson – Crop Circle Consulting,
  • Sharon Conning (Landmark), William Campbell (Nufarm) and Bernie Quade (Landmark) – for assisting with rating plots.
  • NEFF – for funding trial
  • WA Police Department – who used moderation to estimate my travel speed at Tenindewa at 3am on a balmy January Sunday morning.

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 Randomised,Replicated,Blocked

Tenindewa 2011

Sow date Not specified
Harvest date Not specified
Plot size 20m x 2m
Plot replication 3

Glyphosate 450 g/L, Gramoxone 250g/L, Basta, Alliance (paraquate + Amitrole), Ally, Gar-lon, Estericide 680, Atrazine 600g/L, Verdict 520 (haloxyfop 520g/L, Intervix (Imazapyr and Imazamox), LI700 adjuvant, Liase (Ammonium Sulfate) at 2% volume, Hot-Up adju-vant, Supercharge Oil, Wetter TX. – Total application volumes – 98L/Ha.

  • Dark - Herbicides applied from 3.45am-5.45am with no visible daylight, conditions were Delta T of 7.6 through to Delta T of 6.0, Rel humidity 47 through to 52%, temp 23C through to 22C.
  • Light – Herbicides applied from 6.00am – 6.30am with good visible daylight, conditions were Delta T 6.0, Temp 21.4C, Rel Humidity 53%.


Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

@T1: 10 days after application @T2: 17 days after application
# Treatment 1
Weed control (%) Weed control (%)
1 Glyphosate 2L+Hotup 1% 70 78.33
1 Glyphosate 2L+Amsul 1%+Schrge 1% 0.7 71.67
2 Glyphosate 2L+Amsul 1%+Wetter TX 0.20% 75 85
2 Glyphosate 2L+Amsul 1%+LI700 0.50% 68.33 93.33
3 Glyphosate 2L+Verdict 100ml+Amsul 1%+LI700 0.50% 73.33 83.33
3 Basta 4L 85 78.33
4 Glyphosate 2L+Flexi N 2L 66.67 86.67
4 Glyphosate 2L+Ester 680 500ml+Garlon 120ml+Ally 7g+AMS LI700 75 80
5 Paraquat 1L 76.67 68.33
5 Paraquat 2L 83.33 75
6 Alliance 3L 73.33 70
6 Atrazine 2L+Schrge 1% 13.33 1
7 Intervix 800ml+Schrge 1%+Amsul 1% 35 1
7 Intervix 800ml+Verdict 100ml+amsul 1%+Schrge 1% 10 1
8 Glyphosate 2L+Intervix 800ml+Amsl 1%+Schrge 1% 75 90
8 Verdict 520 100ml+Schrge 1% 10 1
9 Glyphosate 2L+Amsul 1%+LI700 0.50% (daylight) 73.33 83.33
9 Glyphosate 4L+Amsul 1%+LI700 0.50% (daylight) 73.33 91.67
10 Glyphosate 2L+Amsul 1%+Schrge (daylight) 70 68.33
10 Paraquat 2L (daylight) 81.67 65

Weed control %

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
2011 120.9mm
2010 86.9mm
2009 88.9mm
2008 116.6mm
2007 89.8mm
2006 66.1mm
2005 78.0mm
2004 63.3mm
2003 60.9mm
2002 51.5mm
2001 28.9mm
2000 92.9mm
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

2011 trial report

Trial last modified: 25-06-2019 12:10pm AEST