Alternative Second Knock Options for Grass Weeds in Fallow - Goondiwindi

2019
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) N/A
Year(s) 2019
Contributor Northern Grower Alliance
Trial location(s) Goondiwindi, NSW
Alternative Second Knock Options for Grass Weeds in Fallow - Goondiwindi locations
Aims

To evaluate alternative second knock options for grass weeds

Key messages

The trial was conducted near Goondiwindi on a population of ~6 barnyard grass/m2. Majority of weeds were at flag leaf emergence with first flowers visible on ~20% of the population. Average weed size was ~20cm diameter and 15cm tall.
The 1st knock application was applied commercially (Roundup + Clethodim + Starane + LVE + Banjo) with 2nd knock treatments applied 8 days later.
All 2nd knock treatments significantly increased % weed burndown, when assessed 5 days after application with Gramoxone 2.4 L/ha providing significantly increased burndown compared to all other treatments.
Assessment of regrowing barnyard grass was conducted 28 days after the 2nd knock application. The 1st knock alone had provided ~85% control with no significant improvement in control from any 2nd knock treatment. In this situation, when sprayed on advanced barnyard grass growth stages, there was no significant improvement in control from any 2nd knock treatment.

Lead research organisation N/A
Host research organisation N/A
Trial funding source GRDC NGA00004
Related program N/A
Acknowledgments N/A
Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Weed: Other grass
Treatment type(s)
  • Herbicide
  • Herbicide: Rate
  • Herbicide: Type
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Goondiwindi 2019

Sow date Not applicable
Harvest date Not applicable
Plot size Not specified
Plot replication Not specified
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
Goondiwindi, NSW Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Goondiwindi, NSW 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 Goondiwindi NSW
2019 63.1mm
2018 86.3mm
2017 41.4mm
2016 59.4mm
2015 71.1mm
2014 43.8mm
2013 87.0mm
2012 182.8mm
2011 204.3mm
2010 139.8mm
2009 126.8mm
2008 64.4mm
2007 38.4mm
2006 78.8mm
2005 126.5mm
2004 175.9mm
2003 209.6mm
2002 215.4mm
2001 306.0mm
2000 398.7mm
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.

Goondiwindi NSW

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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

2019 trial report



Trial last modified: 14-03-2023 09:29am AEST