Getting the best from Clethodim in canola - nozzle type and timing of application

2015
CC BY 4.0

Research organisatons
Funding source

Trial details

Researcher(s) Dale Grey (DEDJTR)
Jon Midwood (SFS)
Julia Severi (DEDJTR)
Year(s) 2015
Contributor Southern Farming Systems
Trial location(s) Westmere, VIC
Getting the best from Clethodim in canola - nozzle type and timing of application locations
Aims

To compare two nozzles, a 90 degree vs a 45 degree spary angle nozzle, in their efficacy in controlling ARG in canola. The 90 degree angled nozzle was tested at two droplet sizes, (i) medium and (ii) very coarse. 

Key messages
  • Clethodim sprayed with medium droplets provided better control of annual ryegrass (ARG) than very coarse droplets when at the 4 leaf growth stage of the weed
  • Clethodim effectively controlled ARG at mid-tiller and late-tiller growth stage, irrespective of nozzle type
  • Delaying spraying until ARG is at late-tiller stage may compromise canola yield 
Lead research organisation Department of Economic Development, Jobs, Transport and Resources VIC
Host research organisation Southern Farming Systems
Trial funding source GRDC DAV00143
Related program N/A
Acknowledgments

Thanks to Syngenta for supplying the SPE 83-03 nozzle and water sensitive paper and SFS sta for trial management. Further thanks to DEDJTR staff Dr James Nuttall and Ashley Wallace for their assistance with trial design and Madeleine Francis for assisting with data collection.

Improving practices & adoption through strengthening D & E Capability & delivery in the southern region (RRA) – DAV00143 GRDC DEDJTR Bilateral Research Agreement. 


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

Method

Crop type Oilseed: Canola
Treatment type(s)
  • Herbicide: Application Method
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Westmere 2015

Sowing machinery

Harvested by direct heading 

Sow date 4 May 2015
Harvest date 5 December 2015
Plot size 10m x 1.6m
Plot replication Not specified
Herbicide

Clethodim (Select®) applied at 0.5L/ha 

SpraymateTM  Liase  applied at 1L/ha

 

These were mixed with a spraying oil --> Uptake applied at 0.5L/ha 

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
Westmere, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Westmere, VIC 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 Westmere VIC
2015 482.6mm
2014 457.0mm
2013 451.8mm
2012 466.6mm
2011 494.5mm
2010 483.6mm
2009 416.3mm
2008 394.1mm
2007 381.0mm
2006 367.4mm
2005 388.6mm
2004 392.0mm
2003 416.1mm
2002 402.3mm
2001 451.9mm
2000 441.1mm
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

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Climate

Westmere VIC 2015


Observed climate information

Rainfall avg ann (mm) 520.8mm
Rainfall trial total (mm) 355.8mm

Derived climate information

Westmere VIC

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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: 20-10-2019 11:53am AEST