Minnipa Agricultural Centre SA trials

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Trial	Contributor Funding sources	Year	Trial site

Demonstrating integrated weed management strategies to control barley grass in low rainfall zone farming systems 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 10 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.	SARDI Minnipa Agricultural Centre GRDC	2019	Minnipa Agricultural Centre SA
Research organisaton
Seeding rate by row spacing for barley grass management To investigate the potential non-chemical options for managing barley grass in a crop is increasing crop competition by reducing row spacing and increasing sowing rate.	SARDI Minnipa Agricultural Centre GRDC	2016	Minnipa Agricultural Centre SA
Research organisaton