Effect of sowing time, crop type and herbicides in annual ryegrass control (Roseworthy, SA)

2020
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Ben Fleet
Gurjeet Gill
Contact email gurjeet.gill@adelaide.edu.au
Contact phone +61428592825
Year(s) 2020
Contributor School of Agriculture, Food and Wine - The University of Adelaide
Trial location(s) Roseworthy campus, University of Adelaide, SA
Effect of sowing time, crop type and herbicides in annual ryegrass control (Roseworthy, SA) locations
Aims

This field trial at Roseworthy was undertaken to investigate factorial combinations of sowing time, crop type and herbicides on the management of annual ryegrass.

Key messages

Annual ryegrass (ARG) spike density and seed production were significantly reduced when seeding was delayed by two weeks (P=0.015 and P=0.017). This was not expected as ARG plant density was not significantly different between TOS 1 and TOS 2. Greater seed production by ARG in TOS 1 than in TOS 2 appears to be associated with good rainfall in late spring, which was used effectively by ARG but the crop was approaching physiological maturity and could not make use of increased plant available water. Crop type had a significant influence on ARG seed production with 23 to 53% lower ARG seed production in other cereals than Scepter wheat. Both ARG spike density and ARG seed production were significantly influenced by the herbicide treatment (P=0.017 and P=0.052). The new herbicide Overwatch® provided 30% greater ARG control than Boxer Gold®. Crop type also had a significant influence on grain yield (P<0.001), with barley generally yielding higher than wheat. Herbicide treatment had a significant influence on grain yield (P<0.001), where a 30% greater ARG control by Overwatch® than Boxer Gold® resulted in a 14% improvement in grain yield.

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

GRDC for providing funding for the research project.


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

Method

Crop types Weed: Ryegrass Cereal (Grain): Barley Cereal (Grain): Wheat
Treatment type(s)
  • Crop: Type
  • Herbicide: Type
  • Sowing: Rate
Trial type
Trial design

Roseworthy campus, University of Adelaide 2020 Ryegrass

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Roseworthy campus, University of Adelaide 2020 Barley

Sow date 14 May and 29 May
Harvest date Not applicable
Plot size Not specified
Plot replication Not specified

Roseworthy campus, University of Adelaide 2020 Wheat

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
Roseworthy campus, University of Adelaide, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Roseworthy campus, University of Adelaide, SA Chromosol
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.

Roseworthy campus, University of Adelaide SA

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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

2020 trial report



Trial last modified: 20-03-2023 16:29pm AEST