S rolfsii
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Luận án "Nghiên cứu khả năng kháng bệnh héo rũ gốc mốc trắng của cây lạc (Arachis hypogaea L.) được chuyển gen Chi42" được hoàn thành với mục tiêu nhằm biểu hiện thành công gen mã hóa chitinase 42 kDa từ T. asperellum SH16 ở giống lạc L14 và tạo được các dòng lạc chuyển gen có khả năng kháng nấm S. rolfsii mạnh.
163p hoangnhanduc 28-03-2023 31 11 Download
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Bài viết Phân lập và nghiên cứu đặc điểm sinh học của chủng nấm Sclerotium rolfsii gây bệnh thối gốc lạc được thực hiện nhằm xác định đặc điểm sinh học của nấm S. rolfsii, từ đó định hướng biện pháp phòng và điều trị bệnh thối gốc trên cây lạc hiệu quả hơn.
13p visirius 11-01-2023 18 4 Download
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Nghiên cứu này được thực hiện nhằm mục tiêu xác định được các mẫu vi khuẩn đối kháng từ đất có hiệu lực ức chế cao với nấm Colletotrichum spp. gây bệnh thán thư ớt, cũng như một số tác nhân gây bệnh cây nguy hiểm truyền qua đất bao gồm Phytophthora spp., Fusarium spp., Rhizoctonia sp. và S. rolfsii.
5p viclerkmaxwel 16-02-2022 23 2 Download
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Mục đích nghiên cứu của đề tài là phân lập, tuyển chọn, đánh giá khả năng đối kháng với nấm Sclerotium rofsii trong điều kiện in vitro cũng như hạn chế bệnh thối gốc mốc trắng trong điều kiện in planta của các dòng vi khuẩn đối kháng vùng rễ lạc làm vật liệu cho nghiên cứu phòng trừ bệnh hại trên đồng ruộng và cơ chế đối kháng với nấm S. rolfsii của vi khuẩn đối kháng vùng rễ.
126p xedapbietbay 29-06-2021 28 6 Download
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Stem rot caused by Sclerotium rolfsii is a very important soil-borne disease of peanut. S. rolfsii is a necrotrophic plant pathogenic fungus with an extensive host range and worldwide distribution.
15p vilichoo2711 23-06-2021 8 0 Download
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Bài viết trình bày quá trình chiết xuất, xác định hàm lượng saponin và polysaccharide toàn phần từ củ Đảng sâm; khảo sát khả năng kháng sinh của cao chiết nbutanol đối với nấm S. rolfsii và F. oxysporum nhằm định hướng cho các nghiên cứu sâu hơn tiếp theo. Bên cạnh đó, phân lập hợp chất lobetyolin bằng các phương pháp sắc kí, cấu trúc hóa học của lobetyolin được xác định bằng ESI-MS/MS ở hai chế độ positive mode và negative mode.
6p vichaelisa2711 22-05-2021 24 2 Download
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Brinjal or eggplant is the fourth most important vegetable crop in India in terms of production; India being its second highest producing country with 23.7% of world’s total share. Collar rot disease is proving to be a constraint for brinjal production with yield losses upto 30%. The pathogen Sclerotium rolfsii is able to attack all stages of the crop and is difficult to manage. A study was undertaken to investigate the efficacy of botanicals and bioagents in the management of the disease.
9p trinhthamhodang11 27-04-2021 13 1 Download
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This study indicated that the leaves and twigs of E. fortune possesses potent in vitro antifungal activity against S. rolfsii and R. solani and contains bioactive compounds that could be used as active ingredients for developing botanical fungicides against plant diseases.
9p nguaconbaynhay11 01-04-2021 15 2 Download
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Stem and pod rot of groundnut caused by the pathogen Sclerotium rolfsii, which has a wide host range and it affects the yield losses up to 30-40% in groundnut in India. The persistence of infection caused by sclerotia of S. rolfsii inciting disease stem and pod rot of groundnut following the incorporation of mustard (Brassica nigra) plant parts into soil was examined through an experiment under greenhouse conditions.
5p trinhthamhodang1218 26-02-2021 6 1 Download
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In view importance of disease, present investigation was under taken for find out the effect of soil solarization in management against fungus S. rolfsii causing stem rot in chilli.
5p cothumenhmong9 18-01-2021 11 2 Download
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The collar rot caused by Sclerotium rolfsii is an important fungal pathogen in chickpea root disease complex causing serious losses. In the present study, efforts were made to prepare and test the bioefficacy of eight solid formulations and three liquid formulations against chickpea collar rot (In vitro and In vivo). The results indicated that, among all the eight solid substrates used, talc powder formulation was found to be the best carrier material to retain and support maximum propagules of Trichoderma compared to the remaining carriers.
9p trinhthamhodang1216 19-11-2020 19 3 Download
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The experiment was conducted at farmer‟s fields of Village Nawgaon, BlockBilha, Dist- Bilaspur (Chhattisgarh), India. The study was performed under assured irrigated condition of upland in paddy-chickpea-paddy cropping system. Studies focused on the efficacy of bio-control agents at natural field condition through evaluation and demonstration leads to maximum productivity of chickpea.
9p chauchaungayxua8 03-10-2020 12 2 Download
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Biological control represents an important approach of agricultural biotechnology for controlling many fungal plant pathogens. Trichoderma spp. are the most promising and effective bioagents against many plant pathogenic fungi. In present paper, twenty Trichoderma isolates were isolated from chickpea rhizosphere soil and screened for their efficacy against soil borne plant pathogens namely R. bataticola, F. oxysporum ciceri and S. rolfsii. In chickpea the isolates ATPU 1, ATPP 6, KNN 4, KNO 2, KNPG 3 and KNP 1 were most efficient in the production of volatile and non-volatile compounds.
6p chauchaungayxua8 03-10-2020 9 1 Download
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The objective of the present study is to unravel the induction of various defense related genes encoding proteins implicated in strengthening of plant cell walls by biocontrol agents treatments in response to infection by S.rolfsii in tropical sugarbeet ecosystems.
16p nguaconbaynhay7 15-08-2020 13 1 Download
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Sclerotium rolfsii was isolated from infected chickpea plant sample collected from the chickpea’s field of Agriculture Research Station, Ummedganj, (Kota). In epidemiological studies, mycelium growth and sclerotia formation by S. rolfsii was significantly influenced with media, temperature and pH level.
12p nguaconbaynhay7 15-08-2020 12 1 Download
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An investigation was undertaken on fractionation of secondary metabolites from Ocimum sanctum and Aloe barbadensis Mill to check their antifungal activity against Aspergillus niger and Sclerotium rolfsii. Isolation of secondary metabolites was done by cold percolation and soxhlet extraction method with Methanol. Cold percolation method was found effective to get more phytochemicals. Analysis was done to check the presence of phytochemicals likes Alkaloids, Tannins, Saponins, Phenols, Flavonoids, Glycosides, Steroids and Terpenoids. Also qualitative tests viz.
8p caygaocaolon6 30-07-2020 22 3 Download
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Morphological and cultural variability of S. rolfsii infecting tomato were studied on different solid and liquid media based on radial growth, topography, sclerotial number, diameter of sclerotia, test weight of sclerotial bodies and dry mycelial weight. Significant variability with reference to mycelial and sclerotial characters was observed on different media. This investigation revealed that the maximum mycelial growth was observed in Potato Dextrose Agar (9 cm) and more test weight (262 mg) of sclerotial bodies was recorded in Sabouraud’s dextrose agar.
8p chauchaungayxua6 26-06-2020 7 2 Download
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Foot rot of tomato is an important disease which causes severe loss in tomato production. The present study was carried out to evaluate five bioagents and six fungicides against Sclerotium rolfsii. Among the five antagonists tested the maximum inhibition was observed in Trichoderma virens (67%) and contrarily, no inhibition was observed in Bacillus subtilis. Six fungicides viz., carbendazim, captan, tebuconozole, copper oxychloride, hexaconozole and Tebuconazole +Trifloxytrobin at different concentrations (50, 100, 150, 200, 250 and 500 ppm), were tested.
8p chauchaungayxua6 26-06-2020 16 2 Download
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Extracts of certain plants have been used to control the plant diseases since several years. Here we report in-vitro studies to examine the antifungal activity of aqueous leaf extractsof three plants and neem oil against three post-harvest fungal pathogens viz., Rhizopus arrhizus, Sclerotium rolfsii, Fusarium solani. Among the leaf extracts, Duranta erecta showed maximum antifungal activity against the pathogens, followed by Lasonia inermis, Neem oil, and Cocculus hirsutus. The degree of inhibition increased correspondingly with increasing concentrations of the plant extracts.
11p nguaconbaynhay6 23-06-2020 18 1 Download
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Collar rot of chilli caused by Sclerotium rolfsii Sacc. is currently occurring in chilli growing areas of Marathwada region in India. The genetic diversity among eight chilli S. rolfsii isolates collected from eight districts covering various geographic areas of Marathwada region of Maharashtra state were analysed using random amplified polymorphic DNA (RAPD) using five random primers. Size of DNA fragments amplified by the five primers ranged from 0.1 Kb to 10 Kb indicating polymorphism among S. rolfsii isolates. RAPD banding profiles with five different random primers viz.
9p quenchua6 15-06-2020 12 1 Download