The effect of combinations of crop row spacing, seedbed utilisation and pre-emergence herbicides on ryegrass management in barley

2021
CC BY 4.0

Research organisatons
Funding source

Trial details

Researcher(s) Ben Fleet
Gurjeet Gill
Contact email gurjeet.gill@adelaide.edu.au
Contact phone +61428592825
Year(s) 2021
Contributor School of Agriculture, Food and Wine - The University of Adelaide
Trial location(s) Minnipa, SA
The effect of combinations of crop row spacing, seedbed utilisation and pre-emergence herbicides on ryegrass management in barley locations
Aims

This trial aims to investigate the effect of comibinations of row spacing and seedbed utilisation (SBU) on the effectiveness of pre-emergent herbicides on ryegrass management in barley.

Key messages
  • Barley crop establishment was significantly reduced in the wider row spacing treatments. This is most likely due to increased crop intra-row competition rather than fertiliser toxicity from reduced seed bed utilisation (SBU) as fertiliser was banded for crop safety and crop establishment was similar for the two seed boot treatments.
  • Herbicide treatments achieved varying levels of annual ryegrass (ARG) control with Trifluralin reducing ARG plant density by 30%, Overwatch 67% and Boxer Gold 88% compared to untreated control (1092 ARG plants/m2).
  • Improved crop competition in narrower row spacing was reflected in 28% lower ARG seed set in the 25cm row spacing than the wider 37.5cm row spacing. Even though Boxer Gold reduced ARG seed set by 86% compared to the control, ARG was still able to produce 4787 seeds/m2. Such a high level of ARG seed production is likely to have a serious impact on crops grown next year.
Lead research organisation School of Agriculture, Food and Wine - The University of Adelaide
Host research organisation SARDI Minnipa Agricultural Centre
Trial funding source GRDC 9175134
Related program GRDC - Weeds
Acknowledgments

We thanks GRDC for funding this research and a local grower for hosting the trial.


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

Method

Crop types Cereal (Grain): Barley Weed: Ryegrass
Treatment type(s)
  • Herbicide: Type
  • Sowing: Method
  • Sowing: Row Spacing
Trial type Experimental
Trial design Randomised,Replicated

Minnipa 2021 Barley

Sow date 7 June 2021
Harvest date Not applicable
Plot size Not specified
Plot replication Not specified

Minnipa 2021 Ryegrass

Sow date Not specified
Harvest date Not specified
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
Minnipa, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Minnipa, SA Calcarosol
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

Derived climate information

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

Minnipa SA

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

2021 trial report



Trial last modified: 20-03-2023 16:22pm AEST