1,720,976 research outputs found
Patogenisitas isolat bakteri entomopatogenik Bacillus thuringiensis diisolasi dari Spodoptera litura terhadap larva Plutella xylostella (Lepidoptera:Plutellidae)
Full text linkPujiastuti Y, SHK Suparman, Sulistyani DP. 2021. Patogenicity of entomopathogenic Bacillus thuringiensis isolated from Spodoptera litura against Plutella xylostella larvae (Lepidoptera:Plutellidae). In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-9 Tahun 2021, Palembang 20 Oktober 2021. pp. 621-627. Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI). Diamondback moth, Plutella xylostella is an important insect pest on plants belong to Brassicaceae family. Symptoms of attack is hollow leaves and leave dirt on them. If it is not controlled, the yield loss can reach 80%. Control by using biological agents entomopathogenic bacteria Bacillus thuringiensis may be used to reduce the population of P. xylostella. The purpose of research was to study the pathogenicity of B. thuringiensis isolated from cadaver of Spodoptera litura against P. xylostella larvae in the laboratory. The treatments were two isolates of B. thuringiensis encoded SlBt01 and SLBt03. The experiment was designed with a completely randomized design (CRD) separated between isolates. The treatment consisted of 5 treatments (including control) spore density and 5 replications. Observations were mortality rate and time of death of the test larvae. Results showed the highest mortality was in isolate SlBT01 (61.73%) and in isolate SlBt03 (56.66%). The lowest LT50 values of isolates SlBt01 and SLBt03 were 9.78 days and 9.14 days, respectively. Symptoms of infection in Plutella larvae are changes in body color and eventually die with symptoms of wet rot
Efikasi Bakteri Entomopatogen Bacillus thuringiensis Barliner sebagai Agens Hayati Spodoptera litura Fabricus pada Lahan Pasang Surut dan Rawa Lebak
Full text linkArsi A, PujiastutiY, HerlindaS, SHK Suparman, Gunawan B. 2019. Efficacy of entomopathogenic bacteria bacillus thuringiensis barliner as biocontrol agent against spodoptera litura fabricus in tidal and swampy areas In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal 2019, Palembang 4-5 September 2019. pp. 254-263. Palembang: Unsri Press. The entomopathogenic bacteria, B. thuringiensis is used as an insect control agent for Spodoptera litura pests in food plants and horticultural plants. This research was conducted to figure out the toxicity of entomopathogenic bacteria B. thuringiensis to S.litura inhabiting tidal and swampy areas. The entomopathogenic bacteria B. thuringiensis was derived from tidal and swampy areas. Isolation, and identification of the bacteria were conducted in the Laboratrory of Phytopathology and the Laboratory of Entomology, Department of Plsnt Pest and Disease, Faculty of Agriculture, Sriwijaya University Indralaya, under laboratory conditions under temperature of 26o C and relative humidity of 79.6%. the results showed that S. litura larvae treated topically with sopres of B. thuringiensis at spore density of 1 x 106sel/mL was varied. The highest larval mortality was foun in PUM isolaste amounted to 100% with LT50 amounted to 0.56 day, while the lowest mortality was found in PIM isolate amounted to 73.3% with LT50 reached 5.46 days.Keywords: lethal time 50, mortality, tested insec
Teknik Budidaya Petani Tanaman Karet (Hevea brasiliensis) terhadap Hama dan Penyakit di Kecamatan Tanjung Batu, Kabupaten Ogan Ilir
Full text linkArsi A, SHK Suparman , Hamidson H, Gunawan B, Pujiastuti Y, Pratama R, Mauluddin M. 2022. Rubber plant (Hevea brasiliensis) cultivation techniques against pests and diseases in Tanjung Batu District, Ogan Ilir Regency. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-10 Tahun 2022, Palembang 27 Oktober 2022. pp. 898-909. Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).Rubber plant (Hevea brasiliensis) is a plantation crop with high economic value and one of the important agricultural commodities in the international environment and also in Indonesia. Geographical compatibility conditions and soil types that support the growth of rubber plants (Hevea brasiliensis), make farmers in Tanjung Batu District use their land to cultivate rubber plants. Plant-disturbing organisms (OPT) are one of the obstacles encountered in rubber cultivation activities which interfere with growth and affect the yield of rubber latex production. The use of pesticides is mostly done by farmers who think they can get fast and practical results. The purpose of this study aims to evaluate farmers in rubber cultivation techniques against pests and diseases in Tanjung Batu District. This research was conducted from May to July 2022. The method used to observe rubber plants was using a simple purposive sampling method. The results of research on rubber farmers have different planting methods. The observed rubber farmers have the status of profit-sharing land. To increase rubber resistance to pests and diseases, fertilization and sanitation are carried out. Pests and diseases found on farmer's land, namely, leaf fall disease and termite pests
Pengaruh Kultur Teknis terhadap Serangan Penyakit pada Tanaman Oyong (Luffa Acutangula) di Desa Kuripan Kecamatan Empat Petulai Dangku
Full text linkArsi A, SHK Suparman, Hamidson H, Umayah A, Gunawan B, Pujiastuti Y, Pratama R, Pratiwi FA. 2022. The effect of technical culture on disease attacks on oyong (Luffa Acutangula) plants in Kuripan Village, Kecamatan Four Petulai Dangku. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-10 Tahun 2022, Palembang 27 Oktober 2022. pp. 1011-1022. Palembang: Penerbit dan Percetakan Universitas Sriwijaya (UNSRI).The luffa plant/oyong is a fruit vegetable that is widely consumed by Indonesians in the form of fresh fruit The nutritional value of luffa is quite good because this fruit vegetable is a source of vitamins and minerals. Oyong plant is a climbing plant/vine. Oyong plants need a dry climate, with sufficient water availability throughout the season. Agricultural cultivation systems are never free from pests or diseases. In the field of farmers, there is not much knowledge about plant diseases or the causes of the disease itself. For this reason, this research practice aims to determine the effect of intercropping on disease attacks on Oyong (Luffa acutangula) plants. Field practice has been carried out in Kuripan Village, Empat Petulai Dangku District, Muara Enim Regency, South Sumatra Province from May to June 2022. The observation method used in this field practice is the direct observation method in the field which is carried out by determining the land, the land being taken has different cropping patterns. Then determine the plants to be sampled using the diagonal method. The data collected were primary data in the form of direct observation of symptoms in the field and secondary data obtained from farmer interviews. From the observation, there were 2 types of diseases, namely brown spots and virus mosaic
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Pengaruh Mulsa terhadap Serangan Hama pada Tanaman Terung (Solanum melongena L.) di Desa Timbangan Kecamatan Indralaya Utara Kabupaten Ogan Ilir
Full text linkArsi A, Gustiar F, Pratama R, SHK Suparman, Hamidson H, Umayah A, Gunawan B, Pujiastuti Y, Riansyah WH, Djulian D, Muhari M. 2022. The effect off mulch on pest attack on eggplant (Solanum melongena L.) in village Timbangan, Subdisctrict Indralaya North, Ogan Ilir City. In: Herlinda S et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-10 Tahun 2022, Palembang 27 Oktober 2022. pp. 1023-1032. Palembang: Penerbit dan Percetakan Universitas Sriwijaya (UNSRI).Eggplant is a type of vegetable that is favored by the community because besides having a good taste, it also contains lots of vitamins and nutrients. In eggplant cultivation, there are several obstacles that must be faced. This obstacle cannot be separated from the attack by plant pests. Plant damage caused by pests results in decreased production due to the growth and development phase of eggplant plants cannot grow and develop optimally. The purpose of this research is to determine the effect of technical culture on the types of pests, population and intensity of pest attacks on purple eggplant (Solanum melongena L.) in Timbangan Village, Indralaya Utara District, Ogan Ilir Regency. The method used includes determining the land, determining sample plots and sample plants, as well as observing population numbers and intensity of pest attacks. The research was conducted in two eggplant fields with different plant ages. The population number and intensity of pest attacks were analyzed using the t test at the 5% confidence level. The pests found in eggplant are Spodoptera litura, Cheilomenes sexmaculata, and Atractomorpha crenulata. Statistical analysis shows that there are significant differences in the two fields due to different cultivation techniques
Variations on the Author
Full text link“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
Inventarisasi Penyakit Pada Jagung (Zea mays L.) di Desa Bakung Kecamatan Indralaya Utara Kabupaten Ogan Ilir Sumatera Selatan
Full text linkTricahyati, T., SHK., Suparman., Hamidson, H., Arsi, A., Agustin, V., Taqiyyuddin, M., Sari, Y.P., Silalahi, M. Y., Isnaini, H. A., Yahya, I. A. (2024). Inventory of diseases in corn (Zea mays L.) in Bakung Village, North Indralaya District, Ogan Ilir Regency, South Sumatra. In: Herlinda S et al. (Eds.),Prosiding Seminar Nasional Lahan Suboptimal ke-12 Tahun 2024, Palembang 21 Oktober 2024. (pp. 711–719). Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).Indonesia is a country with abundant natural resources. Corn is the second main food crop after rice which is very useful for human and livestock life. This plant is also a type of grass plant with a monocotyledon seed type. However, the productivity and various benefits of corn can be disrupted by biotic and abiotic constraints. These biotic constraints are in the form of attacks by plant pests (OPT). This study aimed to evaluate the implementation of integrated OPT management used by corn farmers in Bakung Village, Indralaya District. This research method uses a purposive sampling method and farmer interviews through questionnaires. From the results of the study, three diseases were found in corn fields, namely leaf blight, leaf rust, and leaf spots. The disease samples found were then identified in the Phytopathology Laboratory of the Pest and Disease Department, Faculty of Agriculture, Sriwijaya University. Leaf blight disease is caused by the fungus Exserihilum turcicum, leaf rust disease is caused by Puccinia polysora Undrew, while leaf spot disease is caused by Helminthosporium sp. There are some farmers who implement PTT such as the application of planting distances that facilitate corn field sanitation, besides also inhibiting the transfer of pests and diseases to other corn plants. There are still many farmers who have not implemented Integrated Pest Management (IPM) and still use pesticides. Of the five farmers interviewed in Bakung Village, Indralaya District, Ogan Ilir Regency, South Sumatra, not a single farmer knew about IPM
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe 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
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