Early or delayed sowing for improved ryegrass control?

2015
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Peter Hooper (Hart Field Site Group)
Sam Kleemann (Univeristy of Adelaide)
Sarah Noack (Hart Field Site Group)
Christopher Preston (Hart Field Site Group)
Year(s) 2015
Contributor Hart Field Site Group
Trial location(s) Hart, SA
Early or delayed sowing for improved ryegrass control? locations
Aims

To investigate the effect of early or delayed sowing on reduction of ryegrass numbers in combination with different preemergent herbicides.

Key messages
  • The early break to the 2015 season meant soil moisture and rainfall conditions were similar between ToS 1 and 2 and there was little variation in annual ryegrass control among preemergent herbicides tested.
  • Grain yield and quality were not affected by pre-emergent herbicide; however, there was a 0.7 t/ha yield penalty for the later ToS.
  • Over two seasons of research ryegrass seed set was greater when sowing was delayed.
Lead research organisation Hart Field Site Group
Host research organisation Hart Field Site Group
Trial funding source GRDC
Related program N/A
Acknowledgments

The financial assistance of GRDC to undertake this research is gratefully acknowledged.

 


Other trial partners University of Adelaide
Download the trial report to view additional trial information

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Herbicide: Timing
  • Herbicide: Type
  • Sowing: Timing
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Hart 2015

Sow rate or Target density Estoc wheat @ 80 kg/ha
Sow date 30 April 2015
Harvest date Not specified
Plot size 1.75m x 10m
Plot replication Not specified
Fertiliser
  • DAP (18:20) + 2% Zn @ 100 kg/ha
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

@T1: ToS 1 (30-12-2014) @T2: ToS 2 (27-05-2015)
# Treatment 1
Ryegrass density (plants/m2) Ryegrass density (plants/m2)
1 Nil 18 6
1 IBS Boxer Gold 3 1
2 IBS Sakura 1 2
2 Triflualin + triallate 2 2
3 IBS Sakura + IBS triallate 0 1
3 IBS Boxer GOld + POST Boxer Gold 1 2
4
4
5
5
6
6

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
Hart, SA Not specified
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
2015 597.6mm
2014 638.6mm
2013 622.8mm
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

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Climate

Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.

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 report and links

2015 trial report



Trial last modified: 06-06-2019 15:37pm AEST