نتایج جستجو برای: rhizoctonia solani ag4
تعداد نتایج: 4715 فیلتر نتایج به سال:
Riad S.R. El-Mohamedy, Plant Pathology Department, National Research Center, Dokki, Giza, Egypt, Hayfa Jabnoun-Khiareddine, and Mejda Daami-Remadi, UR13AGR09, Centre Régional des Recherches en Horticulture et Agriculture Biologique de Chott-Meriem, Université de Sousse, 4042, Chott-Mariem, Tunisia. ________________________________________________________________________ ABSRACT El-Mohamedy, R.S...
پوسیدگی رایزوکتونیایی ریشه و طوقه لوبیا با عامل rhizoctonia solani یکی از مهم ترین بیماریهای حبوبات ایران است این عامل بیماریزا دارای دامنه وسیع میزبانی روی گیاهان زراعی و باغی می باشد. نماتود meloidogyne javanica نیز در سطح جهان از مهم ترین عوامل بیماریزای گیاهی روی اغلب محصولات از جمله لوبیا می باشد با توجه به حضور توامم این دو عامل بیماری در مناطق ایران مطالعه ی این دو میکروارگانیسم مورد توج...
abstract valerian medicinal plant (valeriana officinalis) is a perennial succulent plant that is natural lenitive and good ingrained of diazepam. this study was conducted in order to identify the fungal agents of rhizome and root rot of valerian. infected plant samples that showed the symptoms of rotting and necrosis were collected from karaj and used in order to isolate disease agents. symptom...
The antagonistic activity of three bacterial isolates namely Microbacterium terregens, Cellulosimicrobium cellulans and Bacillus amylollquefaciens was evaluated through direct confrontation method and filtrates culture against the growth of Fusarium solani, Fusarium oxysporum, Rhizoctonia solani and Phytophthra cactorum. All bacterial isolates showed the inhibition of the mycelia growth of the ...
مقایسه سطح زیر کشت چغندرقند در استان خراسان با سطوح مشابه در کشورهای توسعه یافته نشانگر سطح پائین عملکرد کشت چغندرقند در این استان می باشد. پوسیدگی ریشه چغندرقند یکی از عوامل کاهش عملکرد چغندرقند می باشد. طی این بررسی از مناطق مستعد و نیمه مستعد کشت چغندرقند در استان خراسان شامل شهرستانهای تربت جام، تربت حیدریه، چناران، سبزوار (جوین)، سرخس ، شیروان، قوچان، مشهد و نیشابور در سالهای 1374-75 نمونه...
We have tested whether a gene encoding a polygalacturonase-inhibiting protein (PGIP) protects tobacco against a fungal pathogen (Rhizoctonia solani) and two oomycetes (Phytophthora parasitica var. nicotianae and Peronospora hyoscyami f. sp. tabacina). The trials were performed in greenhouse conditions for R. solani and P. parasitica and in the field for P. hyoscyami. Our results show that expre...
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...
Effect of inoculum density and soil tillage on the development and severity of rhizoctonia root rot.
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...
Four hundred bacterial isolates were isolated from rhizosphere of some plants collected from Egypt and screened for production of chitinase enzyme. Only four isolates designated MS1, MS2, MS3 and MS4 were the most potent chitinolytic bacterial species. SDS-PAGE analysis of vegetative and sporulated cells of the four isolates revealed that the protein profile of the four isolates were different ...
ABSTRACT The induction of disease-suppressive soils in response to specific cropping sequences has been demonstrated for numerous plant-pathogen systems. The role of host genotype in elicitation of the essential transformations in soil microbial community structure that lead to disease suppression has not been fully recognized. Apple orchard soils were planted with three successive 28-day cycle...
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