Full description
Why do the trial?Barley grass possesses several biological traits that make it difficult for growers to manage it in the low rainfall zone, so it is not surprising that it is becoming more prevalent in field crops in SA and WA. A survey by Llewellyn et al. (2015) showed that barley grass has now made its way into the top 1 O weeds of Australian cropping in terms of area infested, crop yield loss and revenue loss.
The biological traits that make barley grass difficult for growers to manage in low rainfall zones include:
- early onset of seed production, which reduces effectiveness of crop-topping or spray-topping in pastures,
shedding seeds well before crop harvest, reducing harvest weed seed control effectiveness compared to weeds such as ryegrass which has a much higher seed retention,• increased seed dormancy, reducing weed control from knockdown herbicides due to delayed emergence, and
• increasing herbicide resistance, especially to Group A herbicides, used to control grass weeds in pasture phase and legume crops.
Barley grass management is likely to be more challenging in the low rainfall zone because the growing seasons tend to be more variable in terms of rainfall, which can affect the performance of the pre-emergence herbicides. Furthermore, many growers in these areas tend to have lower budgets for management tactics, and break crops are generally perceived as more risky than cereals. Therefore, wheat and barley tend to be the dominant crops in the low rainfall zone. This project is undertaking coordinated research with farming systems groups across the Southern and Western cropping regions to demonstrate tactics that can be reliably used to improve the management of barley grass.
Created: 2019 to 2021
Issued: 15 03 2023
Data time period: 2019 to 2021
Subjects
Agricultural and Veterinary Sciences |
Barley |
Barley Grass |
Crop and Pasture Production |
Canola |
Cereal (Grain) |
Crop Rotation |
Crop Type |
Forage |
Herbicide Application Method |
Herbicide Type |
Medic |
Oilseed |
Sowing Rate |
Sowing Row spacing |
Weed |
Wheat |
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