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

2021
CC BY 4.0

Research organisatons
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) Birchip, VIC, VIC
Effect of combinations of sowing time, seed rate and herbicides on brome grass management in wheat locations
Aims

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

Key messages
  • Delay in crop sowing by 25 days did not have a significant (P=0.796) effect on brome grass density in wheat (TOS1 = 8.7 brome plants/m2 Vs 8.1 plants/m2 in TOS2). Lack of brome grass establishment during the time gap between TOS1 and 2 is likely to be related to below average rainfall (15.6 mm) during the month of May, which was less than half of the long-term average.
  • Brome grass plant density in wheat was only significantly influenced by the herbicide treatments (P<0.001). Intervix alone and as a follow-up treatment after Trifluralin + Avadex provided significantly greater control of brome grass than the knockdown treatment as well as Rexade treatment.
  • Even at this low weed density site, sole reliance on the knockdown herbicide treatment allowed brome to set 1753 seeds/m2 and build-up its seedbank. Application of Rexade reduced brome seed set by 84% compared to the knockdown control. Treatment with Intervix virtually eliminated weed seed set and could play an important role in brome grass management in the Mallee.
  • Even though the difference in wheat grain yield between the worst (knockdown only) and the best herbicide treatment (Intervix) was 190 kg/ha, these differences (11%) were statistically significant. Based on 2021 wheat grain prices, effective brome control treatments increased revenue by about $70-80/ha.
Lead research organisation School of Agriculture, Food and Wine - The University of Adelaide
Host research organisation Birchip Cropping Group
Trial funding source GRDC 9175134
Related program GRDC - Weeds
Acknowledgments

GRDC for providing funds to undertake this research program and the grower for hosting the trial.


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

Birchip, VIC 2021 Wheat

Sow date 6 May and 21 May
Harvest date Not applicable
Plot size Not specified
Plot replication Not specified

Birchip, VIC 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
Birchip, VIC, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Birchip, VIC, VIC 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

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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.

Birchip, VIC VIC

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

2021 trial report



Trial last modified: 20-03-2023 16:04pm AEST