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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 Media
Cereal disease authorities, supported by the Grains Research and Development Corporation (GRDC), say fungicides have an important role to play in disease control but they should be seen as just one component of an overall management strategy... "And while fungicides can be very effective in offering protection from diseases, they must be used judiciously and as part of a multi-faceted management strategy which should also include c ontrolling the green bridge for cereal rusts, attention to the potential risk of stubble-borne leaf disease when deciding on crop rotations, and avoiding susceptible varieties... The Fact Sheet provides information on identifying and understanding fungal diseases, cereal disease diagnosis, fungicide modes of action, foliar fungicide timing, tips for optimal fungicide efficacy, the economics of using fungicides, fungicide resistance, and stewardship...
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Catalogue: GRDC Media
South Australian pulse growers are being advised to closely monitor crops due to the high risk of diseases... South Australian Research and Development Institute (SARDI) senior pulse pathologist, Dr Jenny Davidson, says prolific crop canopy development has occurred in a number of pulse crops across SA due to high rainfall and warmer than average May and June temperatures... Botrytis grey mould does not normally occur in chickpeas in SA, but if chickpea crops develop heavy canopies and conditions are suitable for Botrytis grey mould (over 18C with high humidity), then these crops will also need to be sprayed with a fungicide, according to Dr Davidson...
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Catalogue: Ground Cover
"Growers can save themselves a lot of time and money spent on eradication and management by preventing diseases getting into crops in the first place," said Dr Ryley, from the Queensland Department of Agriculture, Fisheries and Forestry (DAFF)... If diseases do get into the crop, knowledge about what diseases are around is the best information to be armed with, he said... For example, prevent contaminated soil or plant residues entering the property by: not letting contract headers and other machinery onto their property unless the equipment has been properly cleaned; monitoring visitors to properties - for example, ensuring visitors contact the owner or manager before visiting, not driving vehicles across the property but rather leaving them at the shed and using an on-farm vehicle; and knowing where planting seed has come from and ensuring only seed from a clean crop is used...
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Catalogue: GRDC Research Summaries
Necrotrophic diseases are caused by fungal pathogens that benefit from causing damage to the plant, in contrast to biotrophs that benefit from maintaining the host cells in a living state... The most important necrotrophic foliar diseases in Australia are Stagonospora nodorum blotch and tan spot on wheat, two net-blotch diseases of barley, diseases of legumes caused by the Ascochyta group and canola blackleg... A series of studies by us and our collaborator Friesen have shown that different isolates of S. nodorum can be placed in different races depending on which of up to 17 different effectors are produced...
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Catalogue: GRDC Media
Keep an eye on your canola for diseases in 2015.. We want growers to have a fungicide management plan in place for when new actives come onto the market and we are also encouraging growers to change varieties based on resistance groups... Dr Marcroft says at the end of the season, growers should pull some canola plants out of the ground and cut the stem open to see if they have blackleg symptoms...
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Catalogue: GRDC Media
Keep an eye on your canola for diseases in 2015.. We want growers to have a fungicide management plan in place for when new actives come onto the market and we are also encouraging growers to change varieties based on resistance groups... Dr Marcroft says at the end of the season, growers should pull some canola plants out of the ground and cut the stem open to see if they have blackleg symptoms...
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Catalogue: GRDC Media
Adult plant resistance (APR) to cereal fungal diseases is an important trait for grain growers to consider when choosing varieties to sow... APR can complement a fungicide strategy by protecting, from diseases such as rust, those parts of the plant most responsible for yield... Adult plant resistance is a useful trait to consider in variety selection, and understanding how it works can make fungicide application decisions easier...
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Catalogue: Grains Notes DEPI VIC
Septoria blotch of field peas is usually a minor disease occurring sporadically in Victoria and South Australia but has caused major crop losses in NSW... Typical leaf lesions caused by Septoria... Septoria can be managed by using an integrated approach that encompasses crop rotation, stubble management and fungicides...
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Catalogue: Grains Notes DEPI VIC
Septoria blotch of field peas is usually a minor disease occurring sporadically in Victoria and South Australia but has caused major crop losses in NSW... Typical leaf lesions caused by Septoria... Septoria can be managed by using an integrated approach that encompasses crop rotation, stubble management and fungicides...
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