Clearfield: a clear winner in brome grass control

CC BY 4.0

Research organisatons

Trial details

Researcher(s) Mike Jackson (Nufarm Australia)
David Scholz (Elders Ltd)
Year(s) 2004
Contributor Liebe Group
Trial location(s) Goodlands, WA
Clearfield: a clear winner in brome grass control locations

To evaluate the efficacy of different formulations of imidazolinones (Group B imi’s) and the sulfonylureas (Group B SU’s) on brome grass.

Key messages
  • Clearfield chemistry significantly increased brome grass control, at this timing compared to the SU's.
  • Clearfield offers control, not suppression.
  • There are many factors that must be weighed up before deciding upon the weapon of choice for brome grass control.
Lead research organisation Elders Ltd
Host research organisation N/A
Related program N/A

Elders would like to acknowledge Mike Jackson from Nufarm for generating the data and the Stanley's for hosting and seeding the trial.

  • Technically reviewed by Mike Jackson and Peter Carlton.

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


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

Goodlands 2004

Sow date 24 May 2004
Harvest date Not specified
Plot size Not specified
Plot replication 3
Psuedoreplication Not specified

80 kg/ha Agstar Extra, 50 L/ha Flexi N IBS


1st July: TriflurX @ 1.1 L/ha, Roundup Powermax @ 0.8 L/ha

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Brome grass control (%)
1 Atlantis 330 mL/ha 61
2 Clearsol 112 mL/ha 99
3 Clearsol 56 mL/ha 94
4 Monza 25 g/ha 60
5 OnDuty 20 g/ha 74
6 OnDuty 40 g/ha 92
7 Product A Rate 1 89
8 Product A Rate 2 99
9 Product A Rate 3 100
10 Product B Rate 1 96
11 Product B Rate 2 100
12 Product C Rate 1 75
13 Product C Rate 2 78
14 Product C Rate 3 85
15 Raptor 30 g/ha 82
16 Raptor 40 g/ha 90
17 Raptor 50 g/ha 89

Brome grass control %

Observed trial site soil information
Trial site soil testing
Site Depth Type pH EC P K N A OC CAT
Goodlands, WA 0 - 10cm Sandy loam
Goodlands, WA 10 - 30cm Sandy loam
Soil conditions
Trial site Soil texture
Goodlands, WA Sandy loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Goodlands, 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 Goodlands WA
2004 199.5mm
2003 197.8mm
2002 159.2mm
2001 194.4mm
2000 228.6mm
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.

Goodlands WA

NOTE: Exact trial site locality unknown - Climate data may not be accurate

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

2004 trial report