نتایج جستجو برای: rhizoctonia spp

تعداد نتایج: 53359  

2005
M. F. Cohen H. Yamasaki M. Mazzola

A low glucosinolate content (21.8 mmol g) Brassica napus seed meal (RSM) applied to orchard soils altered communities of both pathogenic and saprophytic soil micro-organisms. RSM amendment reduced infection by native and introduced isolates of Rhizoctonia spp. and recovery of Pratylenchus spp. from apple roots. Root infection by Rhizoctonia solani AG-5 was also suppressed in split-root assays w...

Journal: :Letters in applied microbiology 2012
F Guermache M Rodier-Goud A Caesar C Héraud M-C Bon

AIMS To simplify the determination of the nuclear condition of the pathogenic Rhizoctonia, which currently needs to be performed either using two fluorescent dyes, thus more costly and time-consuming, or using only one fluorescent dye, thus less accurate. METHODS AND RESULTS A red primary fluorescence (autofluorescence) of the hyphal cell walls and septa of Rhizoctonia spp. with green excitat...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علوم کشاورزی و منابع طبیعی ساری - دانشکده علوم کشاورزی 1392

پکتین ساختار هتروپلی ساکاریدی موجود در دیواره سلولی گیاهان است که دارای نقش های متنوعی در فیزیولوژی ، رشد ، چسبندگی و جدا شدن سلول ها دارد. آنزیم ها پروتئین هایی در نقش کاتالیزور هستند که توسط منابع میکروبی مانند قارچ ها ، باکتری ها ، نماتدها و غیره تولید شده که در مراحل آلوده سازی میزبان گیاهی ترشح آنزیم ها ضروری می باشد. پکتینازها نیز جزئی از آنزیم های خارج سلولی اولیه توسط پاتوژن های گیاهی ا...

Journal: :Mycologia 2013
B S Amaradasa B J Horvath D K Lakshman S E Warnke

Rhizoctonia blight is a common and serious disease of many turfgrass species. The most widespread causal agent, Thanatephorus cucumeris (anamorph: R. solani), consists of several genetically different subpopulations. In addition, Waitea circinata varieties zeae, oryzae and circinata (anamorph: Rhizoctonia spp.) also can cause the disease. Accurate identification of the causal pathogen is import...

Journal: :Phytopathology 2008
K L Schroeder T C Paulitz

Rhizoctonia spp. cause substantial yield losses in direct-seeded cereal crops compared with conventional tillage. To investigate the mechanisms behind this increased disease, soils from tilled or direct-seeded fields were inoculated with Rhizoctonia spp. at population densities from 0.8 to 250 propagules per gram and planted with barley (Hordeum vulgare). The incidence and severity of disease d...

2013
Xiangling Fang Patrick M. Finnegan Martin J. Barbetti

Strawberry (Fragaria×ananassa) is one of the most important berry crops in the world. Root rot of strawberry caused by Rhizoctonia spp. is a serious threat to commercial strawberry production worldwide. However, there is no information on the genetic diversity and phylogenetic status of Rhizoctonia spp. associated with root rot of strawberry in Australia. To address this, a total of 96 Rhizocto...

Journal: :Phytopathology 2001
M Mazzola D M Granatstein D C Elfving K Mullinix

ABSTRACT The impact of Brassica napus seed meal on the microbial complex that incites apple replant disease was evaluated in greenhouse trials. Regardless of glucosinolate content, seed meal amendment at a rate of 0.1% (vol/vol) significantly enhanced growth of apple and suppressed apple root infection by Rhizoctonia spp. and Pratylenchus penetrans. High glucosinolate B. napus cv. Dwarf Essex s...

Journal: :Phytopathology 2007
Charles R Howell

ABSTRACT Good quality seeds of cotton cultivars often escaped pre-emergence damping-off incited by Pythium spp. and Rhizopus oryzae, and they were resistant to postemergence damping-off incited by Rhizoctonia solani. Poor quality seeds, however, were highly susceptible to both phases of seedling disease and required seed treatment in order to survive. Pre-emergence damping-off incited by Pythiu...

ژورنال: :دانش گیاهپزشکی ایران 2014
روشن محمدی دوستمراد ظفری

در طی مطالعه درباره بیماری ریزوکتونیایی سیب ‏زمینی در سال 1385، از مزارع و انبارهای سیب‏زمینی استان‏های همدان و کردستان، پنجاه جدایه با مشخصات قارچ rhizoctonia. solani از ساقه و ریشه و هشت جدایه از سختینه ‏های موجود در سطح غده ‏ها جداسازی شد. بعد از رنگ‏ آمیزی هسته و بررسی‏ های فیزیولوژیکی، تمام جدایه‏ های تحت مطالعه با عنوان گونۀ r. solani شناسایی شدند. برای تعیین گروه‏های آناستوموزی جدایه‏ها،...

Journal: :Communications in agricultural and applied biological sciences 2004
Parissa Taheri Sam Gnanamanickam Monica Höfte

Rhizoctonia sheath diseases of rice, comprising sheath blight, sheath spot and aggregate sheath spot, cause significant yield losses in many rice-growing regions of the world. The emergence of Rhizoctonia sheath diseases as economically important rice diseases is of recent date and has been attributed to the intensification of rice-cropping systems with the development of new short-stature, hig...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید