Pre-emergent knockdown trial


Research organisaton

Trial details

Researcher(s) Catrina Matherson
Year(s) 2015
Contributor Northern Agri Group
Trial location(s) Chapman Valley, WA
Pre-emergent knockdown trial locations

To compare the efficacy of different adjuvants with varying rates added to Glyphosate or paraquat on weeds such as Paddy Melons, Wild Radish, Serradella, Mint weed, Capeweed, Couch grass and Blue Lupin.

Key messages
  • From the statistical analyses performed on this trial it is concluded that Paraquat at 1L with adjvant LI700 at 0.5% is most efficient in causing fast brownout on Paddy Melons, Wild Radish, Serradella, Mint weed, Capeweed, Couch grass and Blue Lupins.  
Lead research organisation N/A
Host research organisation N/A
Related program N/A
  • Thank you Bronze Sponsor AFGRI.
  • Thank you Silver Sponsor Grain Growers.

Other trial partners Not specified
Download the trial report to view additional trial information


Crop type No crop specified
Treatment type(s)
  • Herbicide: Type
Trial type Experimental
Trial design Randomised,Replicated

Chapman Valley 2015

Sow date Not specified
Harvest date Not specified
Plot size 3m x 10m
Plot replication 3
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
Chapman Valley, WA Loamy clay
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Chapman Valley, WA Tenosol
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 Chapman Valley WA
2015 76.2mm
2014 61.8mm
2013 74.2mm
2012 53.9mm
2011 92.3mm
2010 49.4mm
2009 57.8mm
2008 83.6mm
2007 65.5mm
2006 67.3mm
2005 62.7mm
2004 55.5mm
2003 62.8mm
2002 61.2mm
2001 59.2mm
2000 86.2mm
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.

Chapman Valley WA

NOTE: Exact trial site locality unknown - Climate data may not be accurate

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

2015 trial report

Trial last modified: 25-06-2019 14:36pm AEST