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fungal pathogens

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Catalogue: GRDC Factsheets
The best means for controlling powdery mildew is by avoiding more susceptible wheat and barley varieties... if powdery mildew is allowed to develop in crops, there is a serious risk of fungicide resistance developing as well as loss of resistance in current and future varieties... Spraying needs to be done early with full rates of fungicide...
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Catalogue: GRDC Factsheets
Key poinTs A single gene mutation in populations of the powdery mildew pathogen has caused disease control failure by some triazole fungicides... P H O T O : K i T H S i r i J A y A S e n A Use integrated disease management to reduce disease pressure and reliance on fungicides... Apply effective fungicides as soon as the disease becomes apparent; early control is essential to maximise fungicide efficacy...
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Catalogue: GRDC Media
Monitoring of all Western Australian barley crops for powdery mildew disease and careful fungicidal management including the use of seed dressings will reduce the risk of yield losses this season, with commonly grown varieties found to have an increased susceptibility to the disease... Recent rainfall could favour the development of powdery mildew, which has already been observed in barley regrowth at a number of sites across barley growing regions in WA's central and southern grain growing regions... Photo Caption: GRDC-supported research conducted by the ACNFP has found that commonly grown barley varieties have an increased susceptibility to the disease...
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Catalogue: GRDC Updates
Implications of SFNB infection on barley production in Victoria is not understood as no studies into the epidemiology or control of the disease have been documented since its first detection in the early 1990s... The aim of the study was to establish the importance of SFNB to Victorian barley production and identify control strategies for its management... The study has shown that barley varieties with even partial resistance (seedling resistance) can provide control of SFNB...
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Catalogue: GRDC Media
Powdery mildew survey seeks SA barley grower input South Australian barley growers are being urged to help in the fight against fungicide resistance by participating in a survey assessing resistance in the damaging barley disease, powdery mildew... Australian Research Centre for Necrotrophic Fungal Pathogens (ACNFP) director and GRDC western panel deputy chairman Richard Oliver said the samples would reveal fungicide resistance patterns, and help breeders produce new barley varieties resistant to powdery mildew... Professor Oliver said growers could protect barley crops from powdery mildew and limit the spread of resistant powdery mildew strains by controlling barley volunteers, growing barley varieties resistant to the disease and using effective fungicides. "..
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Catalogue: GRDC Media
Western Australian growers are being encouraged to understand foliar fungal diseases of cereals and how to manage them... The Grains Research and Development Corporation (GRDC) has released a western region-specific version of the Cereal Fungicides Fact Sheet, aimed at assisting growers in managing cereal fungicide use... According to GRDC plant health technologies program manager Ken Young, fungicides are just one component of an effective management strategy and do not increase yield; they protect yield potential and cannot retrieve lost yield if applied after infection is established...
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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
Crop health tool addresses new seasonal challenges.. PestFax- a vital link in the fight to maintain Western Australia's current levels of crop health - has resumed its free weekly service, as the new season presents a fresh set of pest and disease challenges... PestFax is widely read and supported by grains industry leaders including agronomists, consultants, farmers, researchers, grain marketers and retailers, with issues delivered to subscribers each Friday via email and available at www.agric.wa.gov.au/pestfax "The service helps the grains industry keep up with seasonal challenges and advises on management options relating to recurring pest and disease threats," PestFax editor and DAFWA entomologist Peter Mangano said...
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Catalogue: GRDC Updates
Controlling pulse diseases in 2011 Jenny Davidson, Rohan Kimber, Michael Lines and Larn McMurray SARDI.. The strategy may also help to reduce early chocolate spot infection, but note that only 2 sprays of carbendazim per crop are permitted to reduce risk of fungicide resistance... Field mould on lentil grain (and other pulses) Quality of pulse grain was compromised during last harvest by a number of factors including weather staining, disease (ascochyta and botrytis) staining, unfilled grain, wrinkled seed coat and field moulds...
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Catalogue: GRDC Updates
Long-term monoculture of a susceptible host results an increase in the numbers of microsclerotes in a paddock... Sclerotia of S. sclerotiorum germinate during cool, wet weather and either directly infect the base of plants at ground level or produce fruiting bodies in which ascospores are produced... The finding contrasts with recent work which shows that Fusarium thapsinum and F. andihazi are responsible for most cases of fusarium stalk rot in northern NSW and ...
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