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blackleg fungus

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Catalogue: GRDC Final Reports
The project has focused on monitoring blackleg populations for virulence by exploiting markers for avirulence (Avr) genes in the fungus, which are complementary to resistance (Rlm) genes in the plant... Selection pressure acting on one avirulence gene can also influence other avirulence genes that are closely linked... Only two genes (LmCys2 and AvrLm6) have mutations in attacking isolates and are considered candidate genes...
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Catalogue: GRDC Updates
Blackleg: developing a prioritised management strategy.. Newly deployed novel sources of resistance remain effective for a number of years before virulent blackleg isolates increase in frequency to a level where significant disease results... We can use the fungal life traits to manipulate the fungal population...
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Catalogue: GRDC Media
Assess blackleg risk to canola yields before spraying crops.. Assess blackleg risk to canola yields before spraying crops Canola growers in the southern cropping region must determine the potential for significant yield losses caused by blackleg infection before investing in and applying post-emergent treatments... Key points contained in the fact sheet include: "It is important for growers to monitor crops each season so they know the extent of blackleg infection and can make more informed management decisions," Dr Marcroft said...
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Catalogue: GRDC Media
Assess blackleg risk to canola yields before spraying crops Canola growers in the southern cropping region must determine the potential for significant yield losses caused by blackleg infection before investing in and applying post-emergent treatments... Growers need to be confident that they will incur significant yield losses before investing in this form of control," Dr Marcroft said. ".. Key points contained in the fact sheet include: "It is important for growers to monitor crops each season so they know the extent of blackleg infection and can make more informed management decisions," Dr Marcroft said...
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Catalogue: GRDC Media
Blackleg disease warning for lower EP canola growers Growers of canola on South Australia's lower Eyre Peninsula are being urged to take measures to prevent severe blackleg fungal disease in their crops this season... Blackleg 1.01: Plant pathologist Steve Marcroft explains how to check your crop for blackleg, how blackleg overcomes the genetic resistance of canola, and explains how to use the Blackleg Management Guide and disease ratings to choose a new canola cultivar to reduce exposure to the worst disease of canola... In summary, the measures that should be taken include: 1/ Choose a canola cultivar with high levels of blackleg resistance for the Eyre Peninsula noting varieties with recent resistance changes (use only the current year's ratings)...
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Catalogue: Ground Cover
By Nicole Baxter Blackleg risk warnings may become as common as sheep grazier weather alerts if researchers can better understand how blackleg interacts with canola plants damaged by grazing... If we know there could be a shower coming tomorrow that could trigger a release of blackleg spores, we could issue a warning to growers to avoid grazing their canola for two days after the shower to reduce the blackleg risk," she says... 2007 has proved to be an excellent year for blackleg with "plenty of it around", but Dr Sprague is confident that what is a menace this year will place scientists one step closer to giving farmers better tools to mitigate the disease and its effects on harvest returns for years to come...
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Catalogue: GRDC Final Reports
Sclerotinia stem rot and blackleg are the two major disease constraints to canola production in Australia... After identifying the genes, they will be functionally analysed by mutation (or silencing) and their role in disease will be determined... A link to more recent research can be found at http://www.botany.unimelb.edu.au/blackleg/index.html..
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Catalogue: GRDC Research Summaries
" Novel Approaches to control fungal diseases of oilseed Brassicas in Australia.. The major disease constraints to Australian canola production are blackleg caused by Leptosphaeria maculans, and stem rot caused by Sclerotinia sclerotiorum... The fungus comprised all isolates cultured from stubble of canola-quality juncea...
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Catalogue: GRDC Media
Sequencing of the genome of the blackleg fungus informs canola industry research The ground-breaking sequencing of the blackleg fungus genome is helping to direct ongoing canola industry research efforts... The sequencing of the genome of the blackleg fungus by a team of Australian and French scientists, announced earlier this year, is already having a positive impact on the canola industry through development of new approaches to predict disease outbreaks... Grains Research and Development Corporation (GRDC) Manager for Crop Protection, Dr Rohan Rainbow, says sequencing of the genome of the blackleg fungus will help researchers understand the fungus' rapid and potentially devastating genetic evolution and improve opportunities to explore alternate disease control mechanisms...
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Catalogue: GRDC Research Summaries
" Novel Approaches to control fungal diseases of oilseed Brassicas in Australia.. The major disease constraints to Australian canola production are blackleg caused by Leptosphaeria maculans, and stem rot caused by Sclerotinia sclerotiorum... The fungus comprised all isolates cultured from stubble of canola-quality juncea...
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