Effect of combinations of sowing time, seed rate and herbicides on brome grass management in wheat

2021
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) N/A
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) Farrell Flat,
Effect of combinations of sowing time, seed rate and herbicides on brome grass management in wheat locations
Aims

This field trial aims to investigate combinations of the wheat sowing time, seed rate and herbicides for achieving effective brome grass control.

Key messages
  • Brome grass panicle density was significantly influenced by the time of sowing of wheat (P=0.034) and herbicide treatments (P<0.001). Three week delay in sowing reduced brome grass panicles from 538 panicles/m2 in TOS 1 to 321 panicles/m2 in TOS 2 (40% reduction).
  • The trends observed in brome grass panicle density were reflected in its seed production. The delay in crop sowing resulted in 21% reduction in brome seed set with 7392 seeds/m2 in TOS 1 as compared to 5807 seeds/m2 in TOS 2 (P=0.025). Rexade provided significantly better seed set reduction (62%) in brome than Trifluralin + Avadex Xtra but was inferior to the Intervix treatments (91-94% reduction).
  • Three week delay in sowing at this site resulted in 29% higher wheat grain yield in TOS 2 (2.198 t/ha) than in TOS 1 (1.703 t/ha). This improvement in wheat yield by delayed crop sowing was associated with 84% reduction in brome plant density in TOS 2 compared to TOS 1.
  • Trifluralin + Avadex Xtra, used in this trial as the control, produced 1.439 t/ha wheat yield, which was a reflection of its low efficacy against brome grass. Rexade, which only had a moderate efficacy on brome, increased wheat grain yield by 45% compared to Trifluralin + Avadex Xtra. The highest wheat yield and the lowest weed seed set in this trial was observed where Intervix post-emergent was used after pre-emergent application of Trifluralin + Avadex Xtra (2.214 t/ha).
Lead research organisation School of Agriculture, Food and Wine - The University of Adelaide
Host research organisation School of Agriculture, Food and Wine - The University of Adelaide
Trial funding source GRDC 9175134
Related program GRDC - Weeds
Acknowledgments

The researchers acknowledge GRDC for funding this research and the grower for hosting the trial. Collaboration with SARDI Clare is also acknowledged.


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

Method

Crop types Cereal (Grain): Wheat Weed: Brome grass
Treatment type(s)
  • Herbicide: Type
  • Sowing: Rate
  • Sowing: Timing
Trial type Experimental
Trial design Randomised,Replicated

Farrell Flat 2021 Wheat

Sow date 28 May and 21 June
Harvest date Not applicable
Plot size Not specified
Plot replication Not specified

Farrell Flat 2021 Brome grass

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
Farrell Flat, Not specified
Derived trial site soil information
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.

Farrell Flat

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 16:12pm AEST