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resistant variety

Catalogue: Ground Cover
Genome sequencing of the pathogen that causes the wheat disease tan or yellow spot is expected to accelerate the release of more resistant varieties and improve resistance ratings for existing cultivars... The director of the Perth-based Australian Centre for Necrotrophic Fungal Pathogens (ACNFP), Professor Richard Oliver, says estimates that the disease causes annual losses of more than $200 million in Australian cropping might be conservative... Leader of tan spot research at ACNFP Dr Caroline Moffat says the new genome sequence means her team can focus on finding sequences for Australian isolates of the disease and genetic analysis of Australian wheat varieties...
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Catalogue: GRDC Media
Growers who observe powdery mildew on barley varieties rated 'resistant' are urged to contact the Centre for Crop and Disease Management (CCDM) at Curtin University to arrange to send samples for analysis... Barley powdery mildew is one of Western Australia's major cereal diseases and in recent years has developed resistance to older triazole (DMI) fungicides and evolved virulence on barley varieties with levels of resistance... "We hope to introduce similar genes into a larger range of varieties, increasing the choice of resistant varieties available to growers and ensuring robust resistance to powdery mildew," he said...
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Catalogue: GRDC Final Reports
1. Management of crown rot It is important that reliable estimates of yield losses in barley in Victoria caused by both F. pseudograminearum and Fusarium culmorum are determined... Crown rot research has shown that average annual losses of 4.5% in paddocks with crown rot symptoms can be reduced following adoption of management strategies evaluated within this project... Resistance to bacterial blight In this project, field peas were shown to vary in their response to bacterial blight caused byPss the inheritance of this variation and its nature (i.e. resistance or tolerance to infection) needs to be determined if breeders are to make continuing progress in developing field pea varieties with resistance to this disease...
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Catalogue: NVT Online Papers
" Nematode Resistance relates to the effect of the variety on the nematode density present within the paddock... There will be a reduction in nematode densities when these varieties are grown... Growing the varieties will, to a lesser degree than growing a resistant variety, reduce the density of the nematode in question and reduce yield loss in subsequent intolerant crops...
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Catalogue: GRDC Media
Watch out for powdery mildew on resistant varieties.. Growers who observe powdery mildew on barley varieties rated 'resistant' are urged to contact the Centre for Crop and Disease Management (CCDM) at Curtin University to arrange to send samples for analysis... Barley powdery mildew is one of Western Australia's major cereal diseases and in recent years has developed resistance to older triazole (DMI) fungicides and evolved virulence on barley varieties with levels of resistance...
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Catalogue: Ground Cover
Middle: Leaf rust pustules are smaller than stem rust and rarely appear on the back of the leaf... It is unlikely that all growers will apply adequate fungicide at the first sign of rust and keep the infection sufficiently under control so that the disease will not spread to neighbouring properties... Equally it is unrealistic to expect that all growers will sufficiently monitor or destroy volunteers growing between seasons to ensure that those volunteers will not harbour rust infections which may be responsible for starting new epidemics...
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Catalogue: Ground Cover
Wheat and barley varieties with genes that provide resistance to Russian wheat aphid ( Diuraphis noxia ) could be available to Australian grain growers as early as the 2014 season... Associate Professor Cakir leads a team of researchers from CSIRO and the Queensland Department of Agriculture, Fisheries and Forestry and international collaborators from the US, France, Argentina, South Africa, Kenya, Ethiopia, Turkey and the International Center for Agricultural Research in the Dry Areas (ICARDA)... Resistant varieties have been sourced from the US, Kenya and South Africa, as well as from international seed collections at the International Maize and Wheat Improvement Center in Mexico and ICARDA in Syria...
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Catalogue: Ground Cover
The bleached lesions in scald are bound by distinctive dark-brown margins... Scald can cause losses as high as 50 per cent, with symptoms first appearing as blue, water-soaked lesions that turn to a grey-green colour before developing into elongated bleached blotches with dark-brown 'scalded' edges... "If resistant varieties are not an option, there are several chemical options available to control barley scald, including seed, fertiliser and foliar options," Dr McLean says...
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Catalogue: GRDC Media
Reports of growers treating stripe rust in moderately resistant wheat varieties have sparked significant concern from leading cereal pathologist, Dr Steven Simpfendorfer... There have been a number of reports of growers being advised to treat stripe rust and apply a fungicide to wheat varieties that are moderately resistant to stripe rust to "preserve green leaf area"... Dr Simpfendorfer says there is no evidence that spraying moderately resistant varieties for stripe rust will result in any return on input cost for growers. "..
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Catalogue: GRDC Media
Reports of growers treating stripe rust in moderately resistant wheat varieties have sparked significant concern from leading cereal pathologist, Dr Steven Simpfendorfer... There have been a number of reports of growers being advised to treat stripe rust and apply a fungicide to wheat varieties that are moderately resistant to stripe rust to "preserve green leaf area"... Dr Simpfendorfer says there is no evidence that spraying moderately resistant varieties for stripe rust will result in any return on input cost for growers. "..
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