Researcher(s) |
Catherine Borger (DPIRD) David Minkey (WANTFA) |
---|---|
Contact email | catherine.borger@dpird.wa.gov.au |
Contact phone | 0467816082 |
Year(s) | 2019 |
Contributor | Department of Primary Industries and Regional Development WA |
Trial location(s) |
Dalwallinu, WA
|
Annual ryegrass at high density reduces crop yield. However, this weed is highly sensitive to crop competition. Initial control with pre-emergent herbicides combined with high seeding rates in cereal crops may be sufficient to control this species.
The trial aims to investigate pre-emergent herbicides and high density crop seeding in a wheat crop.
Increased crop density reduced annual ryegrass density.
Herbicides offered effective weed control, and performance of Sakura® and Boxer Gold® was similar in this season.
Main plot treatments:
No herbicide
Sakura® 118 g/ha pre-seeding
Boxer Gold® 2.5 L/ha pre-seeding
Boxer Gold® 1.25 L/ha pre-seeding and 1.25 L/ha post-emergent
Boxer Gold® 2.5 L/ha + Sakura® 118 g/ha pre-seeding
Sub-plot treatments:
Mace wheat at 45 or 90 kg/ha
Lead research organisation |
Western Australia No-tillage Farmers Association |
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Host research organisation |
Department of Agriculture and Food WA |
Trial funding source | GRDC UOA1903-004SAX |
Related program |
Demonstrating and validating the implementation of integrated weed management strategies to control barley grass in the low rainfall zone farming system |
Acknowledgments |
We would like to thank Dustyn Fry for providing the trial site and running the trial, and staff at WANTFA for assistance with trial management. |
Other trial partners | University of Adelaide |
Crop types | Weed: Ryegrass Cereal (Grain): Wheat |
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Treatment type(s) |
|
Trial type | |
Trial design |
Sow rate or Target density | Not specified |
---|---|
Sowing machinery | Not specified |
Sow date | Not specified |
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Plot blocking | Not specified |
Plot randomisation | Not specified |
Fertiliser | Not specified |
Herbicide | Not specified |
Sow rate or Target density | 45 or 90 kg/ha |
---|---|
Sowing machinery |
Knife points and press wheels, 25 cm row spacing. |
Sow date | 14 June 2019 |
Harvest date | 29 November 2019 |
Plot size | 36m x 1200m |
Plot replication | 2 |
Plot blocking | 2 |
Plot randomisation | Split plot design |
Fertiliser |
80 kg/ha Agras 50 L/ha Flexi N |
Herbicide |
Glyphosate 2 L/ha over the whole trial area.
Main plot treatments No herbicide Sakura® 118 g/ha pre-seeding Boxer Gold® 2.5 L/ha pre-seeding Boxer Gold® 1.25 L/ha pre-seeding and 1.25 L/ha post-emergent Boxer Gold® 2.5 L/ha + Sakura® 118 g/ha pre-seeding |
# |
Treatment 1
|
Treatment 2
|
Ryegrass density (plants/m2) |
---|---|---|---|
1 | █ 45 | █ No herbicide | 327 |
2 | █ 45 | █ Sakura® 118 g/ha pre-seeding | 42 |
3 | █ 45 | █ Boxer Gold® 2.5 L/ha pre-seeding | 65 |
4 | █ 45 | █ Boxer Gold® 1.25 L/ha pre-seeding and 1.25 L/ha post-emergent | 68 |
5 | █ 45 | █ Boxer Gold® 2.5 L/ha + Sakura® 118 g/ha pre-seeding | 37 |
6 | █ 90 | █ No herbicide | 274 |
7 | █ 90 | █ Sakura® 118 g/ha pre-seeding | 21 |
8 | █ 90 | █ Boxer Gold® 2.5 L/ha pre-seeding | 22 |
9 | █ 90 | █ Boxer Gold® 1.25 L/ha pre-seeding and 1.25 L/ha post-emergent | 26 |
10 | █ 90 | █ Boxer Gold® 2.5 L/ha + Sakura® 118 g/ha pre-seeding | 29 |
Rainfall avg ann (mm) | 347mm |
---|---|
Rainfall avg gsr (mm) | 272mm |
Rainfall trial total (mm) | 182mm |
Rainfall trial gsr (mm) | 172mm |
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.