| 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​​​​: Herbicide treatments
Sub-plot treatments: Mace wheat at 45 or 90 kg/ha
| Lead research organisation |
Western Australia No-tillage Farmers Association |
|---|---|
| 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 type | Cereal (Grain): Wheat |
|---|---|
| Treatment type(s) |
|
| Trial type | Demonstration |
| Trial design | Randomised,Replicated,Blocked |
| 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 |
| Trial design method | SPD Split Plot Design |
| Plot size | 36m x 1200m |
| Plot replication | 2 |
| Plot blocking | 2 |
| 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.
