نتایج جستجو برای: leaf rust

تعداد نتایج: 90061  

Journal: :journal of crop protection 2012
safar ali safavi farzad afshari

race-specific resistance of wheat to yellow rust caused by puccinia striiformis f. sp. tritici has been reported as short-lived. partial resistance, a kind of quantitative resistance, has been reported to be more stable. partial resistance in terms of slow rusting parameters including final rust severity (frs), apparent infection rate (r), relative area under disease progress curve (raudpc), an...

Journal: :به نژادی نهال و بذر 0
فاطمه زرندی دانشجوی سابق بیماری شناسی گیاهی فرزاد افشاری موسسه تحقیقات اصلاح و تهیه نهال و بذر، کرج سعید رضائی دانشگاه آزاد اسلامی، واحد علوم و تحقیقات، تهران.

in the present study resistance of some elite lines of wheat at seedling stage were evaluated in cereal rusts greenhouse at seed and plant improvement institute in karaj and at adult plant stage in ahvaz under artificial inoculation with an isolate of leaf rust from ahvaz. for seedling resistance, different components of resistance were measured. the results showed that lines m-85-1, m-86-1 and...

2008
R. PRATT S. GORDON P. LIPPS G. ASEA G. BIGIRWA K. PIXLEY

Maize (Zea mays) production in sub-Saharan Africa is constantly threatened by the potential outbreak of multiple foliar diseases such as maize streak, northern leaf blight, gray leaf spot, and rust. Improvement of host resistance to these diseases can provide an important component of integrated pest management (IPM). In this paper, conventional and molecular marker-assisted breeding approaches...

Journal: :Plant physiology 1942
H G Heggeness

During the course of current investigations on the effect of minor elements on the nutrition of flax it has been observed that applications of boron, as sodium tetraborate, to field plots have essentially prevented the development of rust (Melampsora lini) on Bison and Redwing flax. The borax was applied in solution at the rate of sixty pounds to the acre, on May 23, two weeks after germination...

2003
D. K. Berner L. K. Paxson

Yellow starthistle (YST) (Centaurea solstitialis) is an invasive weed in the USA and a target of classical biological control. However, the precise geographical origin(s) of YST in the USA is not known. This study was conducted to learn whether the origin(s) of YST in California, USA could be determined on the basis of digital image analysis (DIA) of YST reactions to isolates of the rust Puccin...

2013
Elsa Ballini Nick Lauter Roger Wise

Rusts are one of the most severe threats to cereal crops because new pathogen races emerge regularly, resulting in infestations that lead to large yield losses. In 1999, a new race of stem rust, Puccinia graminis f. sp. tritici (Pgt TTKSK or Ug99), was discovered in Uganda. Most of the wheat and barley cultivars grown currently worldwide are susceptible to this new race. Pgt TTKSK has already s...

2011
Stéphane Hacquard Benjamin Petre Pascal Frey Arnaud Hecker Nicolas Rouhier Sébastien Duplessis

Poplars are extensively cultivated worldwide, and their susceptibility to the leaf rust fungus Melampsora larici-populina leads to considerable damages in plantations. Despite a good knowledge of the poplar rust life cycle, and particularly the epidemics on poplar, the perennial status of the plant host and the obligate biotrophic lifestyle of the rust fungus are bottlenecks for molecular inves...

Journal: :The Plant journal : for cell and molecular biology 2013
Vinay Panwar Brent McCallum Guus Bakkeren

Rust fungi are destructive plant pathogens. The draft genomes of several wheat-infecting species have been released and potential pathogenicity genes identified through comparative analyses to fungal pathogens that are amenable to genetic manipulation. Functional gene analysis tools are needed to understand the infection process of these obligate parasites and to confirm whether predicted patho...

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