نتایج جستجو برای: Damping off

تعداد نتایج: 206245  

Journal: :caspian journal of environmental sciences 2005
m. montazeri h. hamdollah-zadeh

damping off caused by rhizoctonia solani (isolate ag4) constrains growing soybean in the north iranian province of golestan. the pathogen was grown on malt agar containing 0, 50, 100 or 200 ppm trifluralin then its vegetative growth and virulence were evaluated. the response of soybean cv. williams seedlings grown in soil containing 0, 0.5, 1 and 2 ?g ai g-1 trifluralin was investigated. on mal...

Journal: :journal of agricultural science and technology 2011
s. samavat s. samavat h. besharati k. behboudi

biotic as well as abiotic factors may influence the biocontrol activity and population density of pseudomonas fluorescens. however, limited studies have been carried out on the effects of extracellular metabolites of other competitor bacteria, especially on the biocontrol efficiency of p. fluorescens. a greenhouse experiment was conducted to evaluate the potential of the two p. fluorescens isol...

Journal: :چغندرقند 0
اکرم صادقی مربی پژوهشی پژوهشکده بیوتکنولوژی کشاورزی

biological control of sugar beet damping-off of rhizoctonia solani ag-4 by two native streptomyces isolates (s2 and c) was evaluated in green house and field conditions. in dual culture, two streptomyces isolates inhibited mycelial growth of r. solani ag-4. besides, volatile components of s2 and c inhibited r. solani mycelial growth for 72 and 74 percentages, respectively. soil treatment either...

Journal: :یافته های تحقیقاتی در گیاهان زراعی و باغی 0
لاله نراقی موسسه تحقیقات گیاه پزشکی کشور، تهران عبدالرضا احمدی صمد سرکاری اصغر حیدری نصراله مالکی

considering the deleterious effects of chemical pesticides used in agriculture including cotton cultivation, the search about integrated control strategies for important cotton diseases, verticillium wilt and rhizoctonia seedling damping-off is clearly obvious. in this present study, the researcher investigated the effectiveness of the integration of two strategies, biological control (using an...

Journal: :حفاظت گیاهان 0
فاطمه آزاددیسفانی حمید روحانی ماهرخ فلاحتی رستگار عصمت مهدیخانی مقدم

damping-off of seedling is a major disease of cotton in iran. disease may become epidemic in soil with low temperature and high moisture if seed treatment isn’t done. recently, trichoderma spp. are considered as one of the biological control methods of seedling damping-off. one proposed mechanism for biocontrol in trichoderma spp. is stimulation of host defense responses and induction of resist...

Journal: :کنترل بیولوژیک آفات و بیماری های گیاهی 0
حلیه حسینی دانشجوی سابق کارشناسی ارشد، گروه گیاه پزشکی، دانشکده کشاورزی، دانشگاه زابل ناصر پنجه که دانشیار، گروه گیاه پزشکی، دانشکده کشاورزی، دانشگاه زابل حسین علایی استادیار، گروه گیاه پزشکی، دانشکده کشاورزی، دانشگاه ولی عصر(عج)، رفسنجان

salinity stress is one of the most important abiotic factors that restrict the growth and yield of many plants. salinity can increasingly influence the host susceptibility, occurrence and development of plant diseases due to its negative effects on the host plants. mycorrhizal fungi are able to increase the tolerance of some plants to salinity. in this study, the biological effects of glomus mo...

Journal: :گیاه پزشکی 0
شیراحمد سارانی عضو هیئت علمی دانشکده کشاورزی، دانشگاه زابل عباس شریفی تهرانی استاد گروه گیاهپزشکی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران مسعود احمدزاده دانشیار گروه گیاهپزشکی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران محمد جوان نیکخواه دانشیار گروه گیاهپزشکی، پردیس کشاورزی و منابع طبیعی دانشگاه تهران

biological control of soil borne plant pathogens with antagonistic microorganism has been more attracting interest. especially, burkholderia strains have been intensively investigated as biological agents. the objective of this study was finding an effective biologica control agent against the canola damping off caused by rhizoctonia solani. rhizoctonia damping-off is one of the most important ...

To protect the driver of off-highway dump trucks from the harmful vibration, this paper presents the comparison results to determine the optimal damping of the seat system by different optimization design plans. Three optimization schemes are considered including individually optimizing the damping of the cushion, individually optimizing the damping of the seat suspension, and integrately optim...

2013
M. T. Islam A. N. Faruq

Effect of some plant extracts against damping-off disease of some winter vegetable was studied in the net house. Seed treatment with neem leaf, garlic clove, allamonda leaf, ginger rhizome, kalijira seed, bel leaf, turmeric rhizome, katamehedi leaf and onion bulb were evaluated against damping-off, seed germination and growth characters of tomato, eggplant and chilli seedlings. All the treatmen...

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