1,720,955 research outputs found
Cultural and Morphological Variabilty in Rhizoctonia solani Isolates of Different Rice Growing Areas of Chhattisgarh, India
No full textThe sheath blight disease of rice caused by Rhizoctonia solani is an economically important disease in India. A survey was carried out to find the disease severity of sheath blight of rice and collected the disease samples from the different locations of Chhattisgarh. Fifty eight isolates of R. solani collected from various locations of Chhattisgarh were studied for their morphological and cultural variation. Cultural and morphological parameters of each isolate like growth pattern of mycelium, colony colour, Colony growth diameter (mm) at different intervals was recorded after inoculation of R. solani on to the sterilized PDA in 90 mm Petri plates incubated at 28 ± 2 0C in B.O.D incubator after 15 days [1]. The isolates were assigned code numbers such as RS1, where "RS" named Rhizoctonia solani and "1" denote the serial number of the isolate. The R. solani isolates RS1, RS2, RS3, RS4, RS5, RS12, RS19, RS34, RS50 and RS57 were recorded as fast growing isolates. The color of the fungal colony was varied from light brown to dark brown
Evaluation of Antagonists and the Effectiveness of Application Methods against Sheath Blight Disease of Rice under Pot Conditions
No full textRice sheath blight caused by Rhizoctonia solani is one of the main disease of rice in the Chhattisgarh region. Three potential Trichoderma species were evaluated against sheath blight disease of paddy under pot conditions. The Trichoderma spp. Obtained/ isolated from three discrict Rajnandgaon, Raipur and Durg of Chhattisgarh were compared for their efficacy with check fungicide hexaconazole for foliar sprays. This experiment was conducted under pot condition in completely randomyzed design (CRD) with three replications during kharif 2016 and 2017. Among the three potential Trichoderma spp., highly effective species against sheath blight pathogen was evaluated. The disease severity was recorded 14 days after inoculation. The results of comparative foliar application of Raipur, Durg and Rajnandgaon Trichoderma isolates showed that all isolates of Trichoderma spp. significantly reduced the sheath blight disease severity in rice under pot conditions at 30 DAT and 60 DAT planting. Among the Trichoderma isolates, foliar spray of Durg isolate (TD3) was effectively showed 26.24% reduction in disease severity at 30 DAT and 24.85% reduction in disease severity at 60 DAT over control treatment. The highest disease severity was reduced by check fungicide hexaconazole. The Durg isolate (TD3) at 30 DAT and 60 DAT also increased the yield per plant as compared to Raipur (TR2) and Rajnandgaon isolates (TR1)
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Evaluation of Bio-pesticides against Aphid, Hyadaphis coriandri(Das) on Coriander
Get PDFHyadaphis coriandri (Das) is the major species of aphid infesting coriander with a globe-wide distribution. Plant products or bio-pesticides are important alternatives to minimize the use of synthetic chemical pesticides. The present experiment was conducted during Rabi, 2023 at Pt. S.K.S. College of Agriculture and Research Station, Rajnandgaon, Chhattisgarh, in RBD design with seven treatments including six bio-pesticides and a popularly used chemical insecticide along with a control (no treatment) replicated thrice.Results revealed that in the evaluation of bio-pesticides against aphid, H. coriandri (Das) azadirachtin 0.15% (1500ppm) @ 3 ml lt-1 was found to be the second most effective bio-pesticide after the recommended chemical insecticide on coriander after both the sprays with highest yield over control (464.33 kg ha-1) and exhibited 76.89 per cent increase over control with an avoidable loss of 24.76 per cent
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