Herbicide control of summer weeds


Research organisaton

Trial details

Researcher(s) David Scholz (Elders Ltd) and Clare Johnston (Liebe Group)
Year(s) 2012
Contributor Liebe Group
Trial location(s) Site 10, 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
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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)

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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
Site 10, Kalannie, WA 0 - 10cm Sandy loam 6.00 0.12
Site 10, Kalannie, WA 10 - 30cm Sandy loam 4.70
Soil conditions
Trial site Soil texture
Site 10, Kalannie, WA Sandy loam
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 10, Kalannie, WA Sodosol
National soil grid Source
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.

Site 10, 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

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