Control of clethodim resistant annual ryegrass in break crops

2013

Research organisaton

Trial details

Researcher(s) Sam Kleemann (University of Adelaide), Sarah Noack and Peter Hooper (Hart Field Site Group)
Year(s) 2013
Contributor Hart Field Site Group
Trial location(s) Site 5, Hart, SA
Control of clethodim resistant annual ryegrass in break crops locations
Aims

To evaluate the efficacy and crop safety of alternate pre- and post-emergent herbicides and their mixtures for the control of ryegrass in break crops.

Key messages
  • Excellent annual ryegrass control (>85%) with propyzamide either as split application (IBS followed by PSPE) or as a mixture with tri-allate.
  • Atrazine also gave effective control this season with rainfall assisting activity (>79%).
  • Early crop vigour was suppressed with Outlook & the higher split rate (1 kg/ha IBS followed by 1 kg/ha PSPE) of propyzamide.
  • UAN at 20 kg/ha caused some leaf burning, however the crop recovered.
Lead research organisation Hart Field Site Group
Host research organisation Hart Field Site Group
Related program N/A
Acknowledgments N/A
Other trial partners University of Adelaide
Download the trial report to view additional trial information

Method

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

Hart 2013

Sow rate or Target density ATR Gem TT canola
Sow date 13 May 2013
Harvest date Not specified
Plot size 1.4m x 10m
Plot replication 3
Fertiliser
  • DAP (18:20) Zn 2% @ 75 kg/ha
  • UAN (42:0) 75 L/ha 11th July 2013
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Ryegrass density (plants/m2)
1 Nil 64
2 Tri-allate 3.2 L/ha + Dual Gold 0.5 L/ha IBS 9
3 Trifluralin 2 L/ha + Tri-allate 3.2 L/ha IBS 8
4 Outlook 0.7 L/ha IBS + 0.5 L/ha PSPE 27
5 Propyzamide 1 kg/ha IBS 19
6 Propyzamide 0.5 kg/ha IBS + 0.5 kg/ha PSPE 10
7 Propyzamide 1 kg/ha IBS + 1 kg/ha PSPE 5
8 Dual Gold 0.25 L/ha IBS + 0.25 L/ha PSPE 48
9 Experimental 1 9
10 Tri-allate 2 L/ha + clethodim 500 mL/ha 11
11 Tri-allate 2 L/ha + propyzamide 1 kg/ha IBS + clethodim 500 mL/ha 3
12 Tri-allate 2 L/ha + atrazine 1.2 kg/ha PSPE + clethodim 500 mL/ha 13
13 Tri-allate 2 L/ha + propyzamide 1 kg/ha IBS + clethodim 500 mL/ha + Liase 2% 3
14 Tri-allate 2 L/ha + atrazine 1.2 kg/ha PSPE + clethodim 500 mL/ha + Liase 2% 5
15 Tri-allate 2 L/ha + clethodim 500 mL/ha + 20 L/ha UAN 19
16 Tri-allate 2 L/ha + propyzamide 1 kg/ha IBS + clethodim 500 mL/ha +20 L/ha UAN 3
17 Tri-allate 2 L/ha + atrazine 1.2 kg/ha PSPE + clethodim 500 mL/ha + 20 L/ha UAN 11

Ryegrass density plants/m2


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 5, Hart, SA Calcarosol
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 5, Hart, SA Chromosol
National soil grid Source
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

Site 5, Hart SA 2013


Observed climate information

Rainfall trial gsr (mm) 303mm

Derived climate information

Site 5, Hart SA

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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: 06-06-2019 14:29pm AEST