Canola growth regulator trial

CC BY 4.0

Research organisaton

Trial details

Researcher(s) Wes Arnott (SFS)
Dominic Bolton (SFS)
Colin Hacking (SFS)
Year(s) 2002
Contributor Southern Farming Systems
Trial location(s) Gnarwarre, VIC
Canola growth regulator trial locations

To assess the effect of Chlormequat ® at different rates and at different stages of plant growth on reducing the lodging tendency of canola. 

Key messages
  • Plant breeders have done a good job in reducing the lodging tendency of canola varieties. AIR Grace is a particularly good standing variety.
  • Unless you are dealing with very high nitrogen soils and the growing season is particularly favourable, growth regulators should not be required in canola.
  • Chlormequat had no effect on reducing plant height.
  • Chlormequat appeared to have no adverse effect on grain yield and grain quality. 
Lead research organisation N/A
Host research organisation N/A
Related program N/A
Acknowledgments N/A
Other trial partners Not specified
Download the trial report to view additional trial information


Crop type Oilseed: Canola
Treatment type(s)
  • Growth regulator: Rate
  • Growth regulator: Timing
Trial type Experimental
Trial design Replicated,Blocked

Gnarwarre 2002

Sow date 26 May 2002
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Psuedoreplication Not specified
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Variety
Treatment 1
Oil (%) Grain yield (t/ha)
1 Grace T7 : Chlormequat @ 1.25 L/Ha + 0.1% BS1000 at Growth Stages D26 + D30 39.7 3.245
2 Grace T1 : Control 42 3.159
3 Grace T4 : Chlormequat @ 1 L/Ha + 0.1% BS1000 at Growth Stage D30 (early stem elongation) 39.5 3.147
4 Grace T6 : Chlormequat @ 1L/Ha + 0.1% BS1000 at Growth Stage D26 + D30 41.8 3.097
5 Grace T2 : Chlormequat @1 L/Ha + 0.1% BS1000 at Growth Stage D26 (6 leaves) 39.6 3.054
6 Grace T5 : Chlormequat @ 2 L/Ha + 0.1% BS1000 at Growth Stage D30 41.8 2.95
7 Grace T1 : Control 40.6 2.937
8 Grace T3 : Chlormequat @ 2L/Ha + 0.1% BS1000 at Growth Stage D26 40 2.851
9 Grace T1 : Control 41.9 2.839

Grain yield t/ha


Oil %

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Gnarwarre, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Gnarwarre, VIC Chromosol
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 Gnarwarre VIC
2002 486.7mm
2001 473.7mm
2000 414.5mm
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.

Gnarwarre VIC


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

2002 trial report

Trial last modified: 14-11-2019 10:32am AEST