نتایج جستجو برای: root and crown rot of sugar beet caused by rhizoctonia solani ag2

تعداد نتایج: 24351987  

2014
S. J. Abbas B. Ahmad P. Karlovsky

Rhizoctonia solani anastomosis group AG2-2 IIIB is a severe sugar beet and maize pathogen. It causes crown and root rot disease which le ads to y ield losses world-wide. The soil-borne pathogen is d ifficult to detec t and quantify by conventional methods. We developed a real-time PCR (qPCR) assay for the quantification of genomic DNA of Rhizoctonia solani AG2-2 IIIB based on the ITS region of ...

Journal: :چغندرقند 0
مهیار شیخ الاسلامی هیئت علمی بخش تحقیقات آفات و بیماری های گیاهی مرکز تحقیقات کشاورزی و منابع طبیعی استان کرمانشاه

many fungi cause sugar beet root rot during various stages of the plant growth. among them rhizoctonia spp. induce crown rot, dry rot and violet root rot on sugar beet (whitney and duffos,1986). root rot caused by phytophthora drechsleri has been observed in fields with excessive moisture (habibi,1975). pythium aphanidermatum has been recognized as one of the causal agents of sugar beet, dampin...

Journal: :حفاظت گیاهان 0
فلاحتی رستگار فلاحتی رستگار طاهری طاهری جعفر پور جعفر پور روحانی روحانی مهدیخانی مقدم مهدیخانی مقدم

abstract isolates of rhizoctonia spp., obtained from sugar beet roots and crowns with dry rot symptoms that had been collected from various sugar beet production regions in khorasan razavi province during 2008 and 2009, were investigated in this research. characterization by conventional techniques and molecular methods using species-specific primers was carried out. results showed that from 36...

Journal: :Phytopathology 2016
Carl A Strausbaugh

Rhizoctonia root and crown rot is an important disease problem in sugar beet caused by Rhizoctonia solani and also shown to be associated with Leuconostoc spp. Initial Leuconostoc studies were conducted with only a few isolates and the relationship of Leuconostoc with R. solani is poorly understood; therefore, a more thorough investigation was conducted. In total, 203 Leuconostoc isolates were ...

Journal: :چغندرقند 0

root and crown rot of sugar beet caused by rhizoctonia solani ag2-2 is a destructive disease in the main sugar beet growing areas. use of resistant cultivars is the most effective and environmentally safe way to control the disease. in order to find resistant genotypes, 70 sugar beet lines together with resistant and susceptible checks were evaluated against a highly virulent isolate of r.solan...

2012
C. Hillnhütter R. A. Sikora E. -C. Oerke D. van Dusschoten

Belowground symptoms of sugar beet caused by the beet cyst nematode (BCN) Heterodera schachtii include the development of compensatory secondary roots and beet deformity, which, thus far, could only be assessed by destructively removing the entire root systems from the soil. Similarly, the symptoms of Rhizoctonia crown and root rot (RCRR) caused by infections of the soil-borne basidiomycete Rhi...

Journal: :چغندرقند 0
سامان سلطانی نژاد دانشجوی کارشناسی ارشد بیماری شناسی گیاهی دانشکده کشاورزی دانشگاه شهید چمران سید باقر محمودی استادیار مؤسسه تحقیقات چغندر قند رضا فرخی نژاد استاد دانشکده کشاورزی دانشگاه شهید چمران

during 2001-2005, 79 isolates of rhizoctonia from seed rot, seedling damping –off, root rot and dry rot canker of sugar beet were collected. based on morphological characteristics, number of nuclei per cell and hyphal diameter, isolates were classified in two groups, binucleate (4 isolates) and multinucleate (75 isolates). among 75 multinucleate isolates ,27 isolates were identified as  ag4, 28...

Journal: :چغندرقند 0
سیدباقر محمودی مؤسسه تحقیقات چغندرقند محمود مصباح مؤسسه تحقیقات چغندرقند عزیزاله علیزاده دانشکده کشاورزی دانشگاه تربیت مدرس حسن ابراهیمی کولایی مرکز تحقیقات کشاورزی و منابع طبیعی همدان

a comparative study was conducted to find a reliable and simple method for evaluation of resistance of sugar beet genotypes to rhizoctonia root and crown rot. for this, 12 sugar beet genotypes were used in greenhouse, field and in vitro experiments. the field experiment was performed in micro plots (1×1×2 meter) using randomized complete block design with 4 replications. prior to planting, the ...

2016
R. M. Harveson K. A. Nielsen K. M. Eskridge

Harveson, R. M., Nielsen, K. A., and Eskridge, K. M. 2014. Utilizing a preplant soil test for predicting and estimating root rot severity in sugar beet in the Central High Plains of the United States. Plant Dis. 98:1248-1252. Aphanomyces cochlioides and Rhizoctonia solani are important soilborne pathogens causing root diseases that are primary constraints to sugar beet production in Nebraska, C...

Journal: :چغندرقند 0
شیرین فتاحی دانشجوی کارشناسی‪ارشد بیماری شناسی گیاهی، دانشگاه بوعلی سینا دوستمراد ظفری دانشیار دانشکده کشاورزی دانشگاه بوعلی سینا

four sugar beet genotypes with different reactions to root rot pathogens were evaluated for resistance to important root rot agents including pythium aphanidermatum, phytophthora drechsleri, rhizoctonia solani ag-2-2 and r. solani ag-4. inoculums for pythium and phytophthora were 3-5 day actively growing colony of the pathogens on cma medium, while for rhizoctonia isolates were nine infected co...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید