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Catalogue: GRDC Media
Key Points Research into biological control of the costly root-lesion nematode could boost yields and reduce losses... The GRDC-funded research is exploring the potential of naturally-occurring soil organisms to suppress RLN... Dr Seymour says the research will result in the identification of the key organisms involved in the suppression of RLN in northern grain-growing soils and an understanding of soil chemical, physical and biological characteristics associated with suppressiveness...
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Catalogue: GRDC Research Summaries
In many cropping soils of south-eastern Australia the presence of nematodes limits field crop production... Recent reports by Murray and Brennan (2009 a & b) estimated that in south-eastern Australia alone, nematodes are currently reducing wheat and barley production by 4.9% ($98 million) and 5.1% ($42 million) respectively, with losses in excess of 20% possible in the absence of appropriate control strategies... Growers can minimise yield loss caused by the nematodes in two ways...
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Catalogue: Ground Cover
Readers interested in any of the new varieties are encouraged to research them further on the National Variety Trials (NVT) website at www.nvtonline.com.au/new-varieties.. Pulses PB Blitz is a medium red lentil suited to all current lentil areas and is the earliest flowering and maturing red lentil available... Ideally fits medium to very high-rainfall areas including irrigation, and exhibits excellent hybrid vigour...
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Catalogue: GRDC Research Summaries
In mixed farming systems grazing of the pasture phase can be used to minimise weed burdens but for continuous croppers, or within the cropping phase of mixed farming, some tillage might be needed for integrated weed management... From an overall systems perspective, limited and strategically timed tillage could form part of a productive, sustainable system... A central question emerges : How much damage is done to soil by occasional tillage, strategically applied, in an otherwise no-till system We seek to investigate this question based on the hypothesis: That the agronomic and economic benefits of a strategic tillage operation exceed any agronomic costs due to damage to soil structure...
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Catalogue: Ground Cover
Growers who plan their crop rotations could reduce yield losses during the growing season by testing for the microscopic soil pests root lesion nematodes (RLN)... Department of Agriculture and Food, Western Australia (DAFWA) senior nematologist Dr Vivien Vanstone is leading ongoing GRDC-supported research into RLN management in WA. She says the absence of registered chemicals to control nematodes in broadacre crops prevents growers from eradicating the pests. ".. GRDC-funded projects aim to clarify yield losses and ascertain variety tolerance to nematode species in WA. "This will provide information to help growers choose varieties that are the least prone to yield loss under nematode attack. "..
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Catalogue: GRDC Media
"I had always assumed, as had many other researchers, that nematodes ate into the roots, stunting their growth so that the plants could not reach water in the deeper soil," Dr Whish said... His research is finding that the root systems have developed almost normally and Dr Whish instead suspects the nematodes inflict their damage by penetrating the roots' outer layer and restricting their ability to transport water... "The nematodes penetrate the root, lay eggs inside the cortex of the roots and eventually the outer wall of root collapses causing the lesion and we believe this breaks the pipe that transports water to the plant," Dr Whish said...
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Catalogue: GRDC Research Summaries
" Issues -based Communication Northern Region: Nematodes.. Project Code: ECO00004.. The aim of the project is to raise awareness about the risk to crop yield from nematodes, how to identify if your cropping land has nematodes and how to manage nematode infestations to minimise yield losses...
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Catalogue: GRDC Research Summaries
Soilborne diseases pose a significant risk to the Australian cereal industry and can cause unexpected yield responses in field trials... PreDicta B is a unique DNA based service developed to assist Australian grain producers assess levels of a broad range of soilborne plant pathogenic nematodes and fungi before committing a particular crop/variety to a specific paddock... Development and delivery of a training course for scientists working on low rainfall farming systems programs across the southern region to increase awareness of soilborne diseases, summarise visual scoring techniques and merits of DNA tests delivered by SARDI as research tools to assist in site selection and assessing treatment effects in field trials...
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Catalogue: Ground Cover
Deep fertiliser placement to restore productivity.. Subsoil constraints highlighted by GRDC-funded research since 2006 have prompted a new approach to fertiliser applications for the Black family near Toowoomba, Queensland.. "The residual effects of deep-banded immobile nutrients, such as phosphorus, mean that nutrients not taken up by plants in a wet season will remain where they have been placed in the subsoil [down to 20cm] and be available to subsequent crops in lower rainfall conditions."..
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Catalogue: GRDC Research Summaries
The release of improved oat varieties with CCN resistance and tolerance is essential for growers to manage the disease and to produce economically viable oat crops... The expected outcome of this project is the development of molecular markers for CCN resistance and tolerance to evaluate breeding lines in the National Oat Breeding Program... Outputs are the development of molecular markers linked to CCN resistance and tolerance and their application to select for both traits in the National Oat Breeding Program...
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