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rust

Catalogue: Ground Cover
, if a pathogen change occurs where the ASR gene is overcome (such as Yr17 in the Western Ausralian pathotype lineage of wheat stripe rust in 2006), the APR gene/s provide back-up resistance, protecting the crop from catastrophic yield losses... In recent years, varieties have been released that lack ASR genes but carry several APR genes pyramided to provide excellent levels of stripe rust resistance as adult plants... Adult plants of LongReach Spitfire are only expected to lose a maximum of 30 per_cent of their leaf area to stripe rust infection...
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Catalogue: GRDC Updates (North)
The amount of soil N measured in recent years in sub-clover/wheat was greater when grazed than when mulched... Grains Research Update for Advisers Dubbo 24 thFebruary 2000 high-N status suffer the combined stresses of drought and a lack of stem sugar reserves and fail to fill the grain... b) Drought at flowering (small grain) Small but filled grain is generally caused by drought stress coinciding with the period during which potential kernel size is determined...
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Catalogue: GRDC Updates (South)
The amount of soil N measured in recent years in sub-clover/wheat was greater when grazed than when mulched... Grains Research Update for Advisers Dubbo 24 thFebruary 2000 high-N status suffer the combined stresses of drought and a lack of stem sugar reserves and fail to fill the grain... b) Drought at flowering (small grain) Small but filled grain is generally caused by drought stress coinciding with the period during which potential kernel size is determined...
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Catalogue: Grains Notes DEPI VIC
Barley stripe rust (Puccinia striiformis) is currently an exotic disease and barley grass stripe rust can attack some susceptible barley varieties... Stem rust survives the summer mainly on volunteer wheat, barley, triticale and some grasses including common wheat grass and barley grass... The most effective way to control the rusts of barley is to grow varieties with resistance or avoid growing those that are rated as very susceptible or susceptible to each disease...
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Catalogue: GRDC Updates
Variation in NFNB is on the increase and making resistance ratings for varieties more complicated... After the demise of Skiff in 1999 only low levels of the disease were observed in barley crops, mainly on Barque on the lower Yorke Peninsula, and apparently only one pathotype was present... The differences within the rust population go unnoticed in annual surveys conducted by the University of Sydney but can lead to very significant differences in crop damage...
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Catalogue: Ground Cover
LivingstonA is one of few varieties that has moderate tolerance to root lesion nematodes (RLN), along with other desirable featur.. Livingston is one of few varieties that has moderate tolerance to root lesion nematodes (RLN), along with other desirable features... The researchers concluded that where Pt combines with high levels of crown rot (a common scenario), yield losses can be exacerbated if varieties are susceptible to Pt. Instead of a 10 per cent yield loss from Pt in a susceptible variety it could be 30 to 50 per cent if crown rot is combined with a Pt-intolerant variety...
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Catalogue: Ground Cover
About 200 breeding lines were exchanged between the three countries to improve resistance to the diseases blackleg, white rust and sclerotinia and also tolerance to pod shattering, drought and high temperatures, plus the traits required for canola-quality mustard... During two exchanges, 106 breeding lines of Brassica napus and 104 of B. juncea were exchanged between the three countries... All countries will benefit, with India and China seeking to replace their traditional rapeseed and mustard cultivars with Australian canola-quality (low erucic acid, low glucosinolate) B. napus varieties," Associate Professor Salisbury says...
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Catalogue: GRDC Media
Winning grain growers prepare for world study tour.. Winning grain growers prepare for world study tour The 2011 cropping season will be one to remember for three Australian grain growers... The winning growers, one from each GRDC region, have revolutionised their farming systems by improving farming practices and implementing change to increase productivity, sustainability and viability," Ms Paulsen said. "..
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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: Ground Cover
Cereal rust strains provide clues to resistance.. Cereal rust pathotypes - which are races or strains of the disease that vary in their ability to overcome resistance genes in cereal varieties - are common in most Australian wheat, barley, oat, rye and triticale crops... All barley cultivars carrying this resistance gene are currently resistant to leaf rust in Western Australia, while in eastern Australia, some are moderately susceptible to susceptible...
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