Herbicide control of summer weeds

CC BY 4.0

Research organisaton

Trial details

Researcher(s) Clare Johnston (Liebe Group)
David Scholz (Elders Ltd)
Year(s) 2012
Contributor Liebe Group
Trial location(s) Kalannie, WA
Herbicide control of summer weeds locations

To evaluate the economic benefit and effectiveness of different herbicide treatments on mixture of summer grassses and melons.

Key messages
  • Moisture: Ironstone was found across some plots at depth which made any plot response to weed control difficult to measure so that there was more difference due to sub-soil constraints, rather than the individual treatments. Moisture readings were inconsistent and yields were therefore not taken.
  • Weed control: Glyphosate is a very important base component when dealing with a mixture of summer weeds. The trial confirmed previous growers who experience and demonstrated summer grasses required high rates of glyphosate, at these high rates glyphosate provides excellent melon control. The Roundup Attack at 1.8 L/ha stand-alone gave the best control of grass and melons. All mixes containing Roundup Attack at 1.2 L/ha gave acceptable control of grasses and excellent control of melons when ester was added. With melons, the Triclopyr standalone was poor, but with Roundup Attack added had an additive effect, improving control significantly. Whilst no oil was used, perhaps the performance of the bottom three mixes may have given a better result with oil. Ally (metsulfuron) had an additive effect with the grasses but was antagonistic with the melons.
Lead research organisation N/A
Host research organisation N/A
Related program N/A

The Liebe Group for use of their sprayer, McCreery’s for the use of the paddock and hel

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


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

Kalannie 2012

Sow date Not specified
Harvest date Not specified
Plot size 10m x 10m
Plot replication 4
Paddock history 2009 pasture, 2010 wheat, 2011 pasture

Spayed dawn 24/1/12:as per treatment protocol

1. Control – untreated
2. 0.6 L/ha Roundup Attack (Glyphosate 570)
3. 1.2 L/ha Roundup Attack
4. 1.8 L/ha Roundup Attack
5. 1.2 L/ha Roundup Attack, 100 mL/ha Garlon
6. 1.2 L/ha Roundup Attack, 5 g/ha Ally
7. 1.2 L/ha Roundup Attack, 500 mL/ha Ester 680
8. 100 mL/ Garlon (Triclopyr 600)
9. 5 g/ha Ally (Metsulfuron – Methyl 600)
10. 500 mL/ha Ester 680 (2,4-D Ester 680)

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Gross margin ($/ha) Melon control (%) Weed control grass (%)
1 0.6 l/ha Roundup Attack 3.96 45 55
2 1.2 l/ha Roundup Attack 7.92 75 83
3 1.2 l/ha Roundup Attack,100ml/ha Garlon 9.72 86 85
4 1.2 l/ha Roundup Attack, 500ml/ha Ester 680 12.54 95 93
5 1.2 l/ha Roundup Attack, 5g/ha Ally 8.52 69 90
6 1.8 l/ha Roundup Attack 11.88 98 94
7 100 ml/ha Garlon 1.8 53 0
8 5 g/ha Ally 0.6 8 11
9 500 ml/ha Ester 680 4.5 28 0
10 Control 0 0 0

Gross margin $/ha


Melon control %


Weed control grass %

Observed trial site soil information
Trial site soil testing
Site Depth Type pH EC P K N A OC CAT
Kalannie, WA 0 - 10cm Sandy loam 6.00 0.12
Kalannie, WA 10 - 30cm Sandy loam 4.70
Soil conditions
Trial site Soil texture
Kalannie, WA Sandy loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Kalannie, 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 Kalannie WA
2012 299.9mm
2011 268.4mm
2010 233.4mm
2009 267.4mm
2008 316.1mm
2007 273.5mm
2006 274.8mm
2005 236.7mm
2004 253.6mm
2003 263.5mm
2002 190.5mm
2001 240.9mm
2000 346.2mm
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



Derived climate information

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

Kalannie WA


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

2012 trial report

Trial last modified: 08-05-2019 09:29am AEST