Improving the efficacy of clethodim herbicide against annual ryegrass

2012
CC BY 4.0

Research organisatons
Funding source

Trial details

Researcher(s) Peter Boutsalis (UoA)
Gurjeet Gill (UoA)
Peter Hooper (Hart)
Sam Kleemann (UoA)
Christopher Preston (UoA)
Year(s) 2012
Contributor Hart Field Site Group
Trial location(s) Hart, SA
Improving the efficacy of clethodim herbicide against annual ryegrass locations
Aims

To investigate the factors influencing (i.e. ryegrass size) performance of ‘dim’ herbicides Select (a.i. clethodim) & Factor (a.i. butroxydim) on Group A resistant ryegrass in canola.

Key messages
  • Clethodim applied at 500ml/ha to ryegrass at the 2 to 3 leaf stage averaged 84% control.
  • Two early applications, ryegrass at 2 to 3 leaf and then again 3 weeks later, gave the best control of resultant ryegrass head numbers.
  • All combinations of clethodim and butroxydim applied after ryegrass reached the 2 to 3 leaf stage significantly reduced grain yield.
Lead research organisation School of Agriculture, Food and Wine - The University of Adelaide
Host research organisation Hart Field Site Group
Trial funding source GRDC
Related program N/A
Acknowledgments

This trial was funded by GRDC & conducted in collaboration wtih Hart & Birchip Cropping Groups & The Univeristy of Adelaide. 


Other trial partners Hart Field Site Group
Download the trial report to view additional trial information

Method

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

Hart 2012

Sow rate or Target density Clearfield canola
Sow date 31 May 2012
Harvest date Not specified
Plot size 1.75m x 12m
Plot replication Not specified
Fertiliser

DAP Zn 2% @ 80kg/ha

Download the trial report to view additional method/treatment information

Download results

Trial results Hart

@T1: @T2: @T3: @T4:
# Treatment 1
Plant density (plants/m2) Plant density (plants/m2) Plant density (plants/m2) Head abundance (heads/m2)
1 clethodim 500ml 53 50 57 91
1 clethodim + butroxydim 500ml + 80g 45 47 49 118
1 clethodim 500ml Ryegrass 2-3 leaf 32 6 11 14
1 clethodim + butroxydim 500ml + 80g Ryegrass 2-3 leaf 35 4 5 4
2 clethodim 500ml 3 weeks after ryegrass 2-3 leaf 43 28 12 33
2 clethodim + butroxydim 500ml + 80g 3 weeks after ryegrass 2-3 leaf 50 37 6 8
2 clethodim 500ml 6 weeks after ryegrass 2-3 leaf 47 39 56 66
2 clethodim + butroxydim 500ml + 80g 6 weeks after ryegrass 2-3 leaf 52 51 49 36
3 clethodim 500ml Ryegrass 2-3 leaf + 3 weeks after ryegrass 2-3 leaf 36 10 6 5
3 clethodim + butroxydim 500ml + 80g Ryegrass 2-3 leaf + 3 weeks after ryegrass 2-3 leaf 48 4 2 0
3 clethodim 500ml Ryegrass 2-3 leaf + 6 weeks after ryegrass 2-3 leaf 35 46 10 25
3 clethodim + butroxydim 500ml + 80g Ryegrass 2-3 leaf + 6 weeks after ryegrass 2-3 leaf 41 51 8 5
4 clethodim + UAN 500ml + 20L Ryegrass 2-3 leaf + 3 weeks after ryegrass 2-3 leaf 46 5 3 10
4 clethodim + butroxydim 500ml + 80g + + UAN 20L Ryegrass 2-3 leaf + 3 weeks after ryegrass 2-3 leaf 44 3 1 1
4
4
5
5
5
5
6
6
6
6
7
7
7
7
8
8
8
8
9
9
9
9
10
10
10
10
11
11
11
11
12
12
12
12
13
13
13
13
14
14
14
14

Head abundance heads/m2


Loading

Plant density plants/m2


Loading
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Hart, SA Calcarosol
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Hart, SA 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 Hart SA
2012 654.6mm
2011 683.8mm
2010 686.7mm
2009 669.9mm
2008 633.9mm
2007 649.9mm
2006 651.2mm
2005 675.4mm
2004 633.0mm
2003 652.2mm
2002 649.4mm
2001 674.5mm
2000 625.6mm
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

Loading

Climate

Hart SA 2012


Observed climate information

Rainfall trial gsr (mm) 168mm

Derived climate information

Hart SA

Loading
Loading
Loading

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: 09-12-2019 10:14am AEST