Effect of combinations of sowing time, seed rate and herbicides on ryegrass management in faba beans (Winchelsea, VIC)

2020
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) 2020
Contributor School of Agriculture, Food and Wine - The University of Adelaide
Trial location(s) WInchelsea, VIC
Effect of combinations of sowing time, seed rate and herbicides on ryegrass management in faba beans (Winchelsea, VIC) locations
Aims

To investigate factorial combinations of sowing time, seed rate and herbicides on the management of annual ryegrass in faba beans.

Key messages

A field trial was undertaken near Winchelsea, VIC to investigate the effect of faba bean sowing time, seed rate and herbicide treatments on annual ryegrass (ARG) control. ARG plant density was unaffected by the seeding date but was significantly influenced by the herbicide treatments. The results of seed production were somewhat surprising. As expected in such a long growing season, the use of pre-emergent treatment of Simazine + Triflur X IBS was unable to provide adequate weed control and resulted in the highest ARG seed set. The results also show that the post-emergent application of Select and Factor were relatively ineffective when used in TOS 1. However, the post-emergent treatments were highly effective in TOS 2. Previous research has shown reduction in the efficacy of these herbicides under cold and frosty conditions as in this study. Crop seed rate had a significant effect on faba bean grain yield (P<0.001) but time of sowing did not influence grain yield (P=0.61). Grain yield increased significantly as seed rate increased from low (4.65 t/ha), medium (5.96 t/ha) to high seed rate (6.51 t/ha). At this high rainfall site, simply relying on pre-emergence herbicides proved inadequate. Simazine + Triflur X had a significantly lower grain yield than faba beans sprayed with a combination of pre- and post-emergence herbicides. Even though the highest ARG plant density present at the site was 33 plants/m2, it was quite competitive with the crop (P=0.01) and reduced its yield by 0.4 t/ha as compared to the treatments where Select or Select + factor were used as post-emergent treatments.

Lead research organisation School of Agriculture, Food and Wine - The University of Adelaide
Host research organisation Southern Farming Systems
Trial funding source GRDC 9175134
Related program GRDC - Weeds
Acknowledgments

GRDC for providing funding for this research project and the Southern Farming Systems team for managing the trial.


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

Method

Crop types Grain Legume: Faba beans Weed: Ryegrass
Treatment type(s)
  • Herbicide: Type
  • Sowing: Rate
  • Sowing: Timing
Trial type Experimental
Trial design Randomised,Replicated,Blocked

WInchelsea 2020 Faba beans

Sow date 22 April and 8 May
Harvest date Not applicable
Plot size Not specified
Plot replication Not specified

WInchelsea 2020 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
WInchelsea, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
WInchelsea, VIC Sodosol
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.

WInchelsea 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 last modified: 20-03-2023 16:39pm AEST