Researcher(s) | N/A |
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Contact email | catherine.borger@dpird.wa.gov.au |
Contact phone | 0467816082 |
Year(s) | 2020 |
Contributor | Department of Primary Industries and Regional Development WA |
Trial location(s) |
Esperance, WA
|
Barley grass is becoming an increasingly problematic weed in Western Australia. A GRDC funded project sought to increase adoption of integrated weed management tactics for barley grass, by working with grower groups to develop regionally appropriate rotations for optimal control. A survey indicated that in southwest Australia, many growers thought their barley grass was resistant to grass selective herbicides and may have developed late germination to avoid pre-seeding herbicides. In this area barley grass was a major problem in pastures, and often in break crops too.
A three year trial aimed to investigate pre-emergent herbicides and autumn tickle in wheat in 2019, pre-emergent herbicides and crop density in barley in 2020 and grass selective herbicides and crop topping in pasture in 2021.
In 2019, herbicides ensured that barley grass density was low throughout the trial.
In spite of good crontrol in 2019, there was high barley grass density in 2020, potentailly from the 2019 seed production and dormant seed bank.
The 2020 use of Intercept® herbicide reduced barley grass across the whole trial, with higher crop yield following Intercept® at 500 mL/ha compared to 375mL/ha.
Lead research organisation |
South East Premium Wheat Growers Association |
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Host research organisation |
Department of Agriculture and Food WA |
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 the Harris family for providing a site and running the trial, and Niki Curtis (SEPWA), Andrea Carmody (SEPWA), Greg Warren (Farm & General) and Pete Gray (DPIRD) for their assistance with the trial management and measurements. The trial was sponsored by BASF (who provided Luximax® herbicide). |
Other trial partners | University of Adelaide |
Crop type | Cereal (Grain): Barley |
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Treatment type(s) |
|
Trial type | |
Trial design |
Sow rate or Target density | 40 or 65 kg/ha |
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Sowing machinery |
Bulk sown with grower's machinery. |
Sow date | 30 April 2020 |
Harvest date | 18 November 2020 |
Plot size | 36m x 1400m |
Plot replication | 4 |
Psuedoreplication | Not specified |
Plot blocking | Yes |
Plot randomisation | Randomised block design |
Fertiliser |
29 June 2020. Zn, Mn Flexi N 50L/ha |
Herbicide |
30 April 2020. Treflan® 2L/ha 29 June 2020. Intercept® 375 or 500mL/ha |
Sow rate or Target density | Not specified |
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Sowing machinery | Not specified |
Sow date | Not specified |
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Psuedoreplication | Not specified |
Plot blocking | Not specified |
Plot randomisation | Not specified |
Fertiliser | Not specified |
Herbicide | Not specified |
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.