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stem rust

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Catalogue: NVT Online Papers
Regional outbreaks are more common, causing losses over limited areas... Stem rust typically causes losses of 10-50 per cent, but this can increase to up to 90 per cent when it occurs in early spring and is not controlled... Stem rust requires living plants on which to grow and reproduce, so to infect crops during the season it must survive over summer by infecting volunteer cereals or grass hosts, known as the 'green bridge'...
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Catalogue: GRDC Updates
White grain At harvest in 2010 a number of growers in the north eastern Eyre Peninsula and Far North regions had deliveries of wheat rejected due to white grain... The fungus is likely to remain a concern for the future although severe problems are only likely to occur where wet springs promote infection late in the season... Growers are encouraged to maintain this level of resistance and avoid adopting varieties more susceptible than GladiusA and YitpiA. Yellow leaf spot The wet spring of 2010 will have increased the levels of the yellow leaf spot fungus (Pyrenophora tritici-repentis) in cereal stubbles...
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Catalogue: GRDC Research Summaries
Although fungicides can control rust, genetic resistance remains the most environmentally acceptable and economical means of rust control in Australia... Northern region grain growers are being reminded to consider adult plant resistance (APR) to fungal diseases such as stem, stripe and leaf rust, when retaining seed this harvest for next year's crop... As news of the first cereal rust outbreaks in southern Australia reach the University of Sydney's Plant Breeding Institute (PBI), northern region growers are reminded to be vigilant in crop monitoring this season...
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Catalogue: Ground Cover
Findings from GRDC-funded trial work in southern Australia, involving several farming groups and New Zealand"s Foundation of Arable Research (FAR), have shown that selecting cultivars based only on their rustresistance rating is not necessarily the most profitable way to control the disease... At an August workshop at Rupanyup, Victoria, FAR researcher Nick Poole told growers that trial results in high-rainfall zones had shown that variety selection was most often profitable when based on an integrated approach - where in-crop disease management and variety resistance were considered together... In the case of stem rust, Mr Poole"s takehome messages were that traditional fungicide timing for stripe rust may not necessarily be appropriate for this disease, because spraying can be economical much later in the crop"s growth stage than for other diseases (such as stripe rust)...
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Catalogue: GRDC Research Summaries
pseudo-hordei (colloquially known as Barley Grass Stripe Rust; BGYR) and stem rust caused by P. graminis f. sp... Poster titled 'Genetic variability within and among formae speciales and putative somatic hybrids of the stem rust pathogen, Puccinia graminis' presented by Lida Derevnina at the 19th Plant and Animal Genome conference, held in San Diego, California (U.S.A.) from 15 - 19 January 2011... Poster titled: 'Seedling resistance to stem rust in Australian barley cultivars' presented by Lida Derevnina at the 2011 Borlaug Global Rust Initiative Technical Workshop held in St Paul, Minnesota (U.S.A.) from 13 - 17 June...
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Catalogue: Ground Cover
The potential threat posed by a new east-African strain of stem rust, Ug99, is seeing researchers worldwide mount wheat-breeding efforts specifically to prevent epidemics as global surveillance initiatives are strengthened.. Even in Australia, where stem rust has not been common due to the genetic resistance incorporated by wheat breeders, rust-disease experts are supporting calls for a more coordinated global monitoring system, as they join international efforts to prevent potential epidemics by incorporating durable sources of resistance such as Sr2... Overall, the potential for a serious international stem-rust epidemic appears to have galvanised efforts to strengthen international monitoring, surveillance and breeding efforts...
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Catalogue: GRDC Updates
STEM RUST IN WHEAT - AN ISSUE FOR AWARENESS AND IDENTIFICATION.. Description Stem rust initially produces reddish-brown spore masses in oval or elliptical pustules with torn margins, 3x10 mm on the stems, the glumes and on both sides of the leaves... It is likely that current varieties have greater resistance compared to those sown in the past but also at Gatton in 2009, the stem rust infection began late, at growth stage 59 "Emergence of inflorescence completed" ten days to two weeks after warm wet weather conducive to stem rust development...
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Catalogue: Ground Cover
The amount of rust present on this sample means that it could be used to infect a differential set directly, reducing the time for pathotype determinations from six weeks to three weeks... The first report of wheat stripe rust for 2011 was made in early July from southern NSW, while oat crown rust and oat stem rust have been frequently observed since April in crop regrowth and weedy oat populations... The ammount of rust present on this sample menas hat it could be used to infect a differential set directly, reducing the time for pathtype determinations from six weeks to three weeks...
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Catalogue: GRDC Updates
Cereal rust diseases - recent developments impacting 2011 decisions.. Disease also thrives under these conditions, and stripe rust reached epidemic levels in southern NSW and Victoria... Stem rust also became a cause for concern in late spring through the Mallee of Victoria and South Australia, although crop losses were expected to be light...
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Catalogue: Ground Cover
The amount of rust present on this sample means that it could be used to infect a differential set directly, reducing the time for pathotype determinations from six weeks to three weeks... The first report of wheat stripe rust for 2011 was made in early July from southern NSW, while oat crown rust and oat stem rust have been frequently observed since April in crop regrowth and weedy oat populations... The ammount of rust present on this sample menas hat it could be used to infect a differential set directly, reducing the time for pathtype determinations from six weeks to three weeks...
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