Spray strategies for multiple herbicide resistant radish


Research organisaton
Funding sources

Trial details

Researcher(s) Andrew Sandison (Planfarm)
Year(s) 2012
Contributor North East Farming Futures
Trial location(s) Northern Agricultural Region (NAR) of Western Australia, WA
Spray strategies for multiple herbicide resistant radish locations

To see if herbicide strategies can be developed that will reduce the heavy reliance that growers in the Northern Agricultural Region now place on the key active pyrosulfatole, found in the products Velocity and Precept.

Key messages

The trials clearly showed that high levels of control of resistant radish populations could be achieved with a 2 spray program that used both old and new chemistries. The trials clearly showed that growers don’t need to use 2 applications of pyrasulfatole in one crop to achieve satisfactory control if small weeds are targeted with robust herbicide rates and good spray coverage.

Growers should be using a 2 spray regime on bad wild radish paddocks as a matter of course. Growers should be targeting radish as early as possible i.e. from the 2 leaf stage of the cereal crop and be coming back 3 - 4 weeks later with a second application using alternative modes of action to those used in the first spray. An example of this would be to use Velocity at 2 leaf stage of the crop and follow up with 24,D amine plus Ecopar as a second spray application.

Lead research organisation North East Farming Futures
Host research organisation N/A
Trial funding source GRDC UB0003
Trial funding source Planfarm
Related program N/A
  • Andrew Sandison and Peter Newman Planfarm Pty Ltd
  • AHRI
  • CSBP
  • Nufarm
  • GRDC
  • Landmark

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


Crop type Wheat
Treatment type(s)
  • Herbicide: Type
  • Herbicide: Timing
Trial type Experimental
Trial design Replicated

Northern Agricultural Region (NAR) of Western Australia 2012

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

This research examined the effectiveness of 2 times of spraying, early 2 - 3 leaf stage of wheat crop, and 3 weeks later i.e. 5 - 6 leaf stage of wheat crop on wild radish control. Multiple herbicides and herbicide mixes were used to see if different sequences and mixes of both older (cheaper) and newer (expensive) herbicides could provide adequate control of known herbicide resistant wild radish populations.

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
Northern Agricultural Region (NAR) of Western Australia, WA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Northern Agricultural Region (NAR) of Western Australia, WA Tenosol
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 Northern Agricultural Region (NAR) of Western Australia WA
2012 99.5mm
2011 177.2mm
2010 115.9mm
2009 124.8mm
2008 172.6mm
2007 120.4mm
2006 128.1mm
2005 116.7mm
2004 117.2mm
2003 136.1mm
2002 125.6mm
2001 99.1mm
2000 152.1mm
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.

Northern Agricultural Region (NAR) of Western Australia 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 last modified: 25-06-2019 12:59pm AEST