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All Journal Jurnal Bios Logos E-Structural JURNAL BUDIDAYA PERTANIAN
Wijayanto, Dimas
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Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Immunology & microbiology Languange, Linguistic, Communication & Media Medicine & Pharmacology Social Sciences

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The Morphological Identification of Fungi Causing Cocoa Fruit Rot Disease and Inhibition Test of Bacillus spp. Against the Fungus in Vitro Elfina, Yetti; ., Irfandri; Sabirunah, Aisyah; Wijayanto, Dimas; Rizqi, Alfin; Mu'arif, Maulana
JURNAL BUDIDAYA PERTANIAN Vol 20 No 1 (2024): Jurnal Budidaya Pertanian
Publisher : Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/jbdp/2024.20.1.83

Abstract

Cocoa plants in Nagari Bunga Tanjung, West Sumatra Province, are infected with cocoa pod rot disease by the fungal pathogen Phytophthora palmivora and this causes serious problems if not appropriately controlled. Therefore, Bacillus spp testing needs to be undertaken to obtain Bacillus spp that were more capable of inhibiting the growth of the pathogen. The research was conducted at the Plant Disease Laboratory, Faculty of Agriculture, Riau University in February-June 2024. Completely Randomized Design (CRD) were used in this emerimantal study with 5 treatments and 4 replicates so that 20 there were experimental units. The treatments given were: B0 : Without Bacillus spp, B1 : Bacillus amyloliquefaciens, B2: Bacillus cereus, B3: Bacillus pseudomycoides and B4: Bacillus velezensis. Variables observed were the macroscopic and microscopic characteristics of Phytophthora palmivora, the diameter of pathogenic colonies after the application of Bacillus spp. and the inhibition of Bacillus spp. bacteria against Phytophthora palmivora. Further testing was done through Duncan's New Multiple Range Test (DNMRT) at the 5% level. The results of the research conducted showed that the cause of cocoa fruit rot disease in Nagari Bungo Tanjuang is Phytophthora palmivora based on morphological characteristics. All Bacillus spp. namely: Bacillus cereus, Bacillus amyloliquefaciens, Bacillus pseudomycoides, and Bacillus velezensis were able to inhibit the growth of Phytophthora palmivora fungus in vitro. Bacillus cereus, Bacillus amyloliquefaciens, Bacillus pseudomycoides, and Bacillus velezensis were able to inhibit the growth of Phytophthora palmivora in vitro. Phytophthora palmivora with inhibition power of 38.89%, 40.28%, 43.33%, 77.78%, respectively.
Identifikasi Morfologi Jamur Penyebab Penyakit Busuk Tandan Kelapa Sawit dan Uji Konsentrasi Kitosan Terhadap Jamur Tersebut Secara in Vitro Elfina, Yetti; Irfandri; Sabirunah, Aisyah; Wijayanto, Dimas; Herhadi Solihin; Iswandi; Harahap, Rizki Bintang Ramadhan
JURNAL BIOS LOGOS Vol. 14 No. 3 (2024): JURNAL BIOS LOGOS
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jbl.v14i3.56213

Abstract

Fruit bunch rot disease on oil palms can cause a decrease in oil palm productivity in Riau Province. An alternative to controlling oil palm bunch rot disease can be using an organic fungicide, namely chitosan. Research aims to identify the causes of oil palm bunch rot disease and test the effect of chitosan concentration in inhibiting this fungus in vitro. The treatments in this study were several concentrations of chitosan (K) consisting of: K0 = Chitosan 0 g.l-1; K1 = Chitosan 2.5 g.l-1; K2= Chitosan 5 g.l-1; K3 = Chitosan 7.5 g.l-1; K4 = Chitosan 10 g.l-1. The chitosan application was analyzed statistically using variance based on the F test at the 5% level using the SPSS application. Research results The cause of oil palm bunch rot disease in Pongkai Village, District XIII Koto Kampar, Kampar Regency, Riau is Marasmius palmivorus based on its morphology. Providing concentrated chitosan able to inhibit the growth of Marasmius palmivorus in vitro. Chitosan concentrations of 2.5 g.l-1, 5 g.l-1, 7.5 g.l-1, 10 g.l-1 able to inhibit the growth of the fungus Marasmius palmivorus with respective inhibitions of 36.52%, 45.68%, 50.55 %, 64.16%, The higher the chitosan concentration, greater the inhibition of fungal growth that occurs.
Benefits and Challenges in Mastering Speaking Skills through Animated Movies: Students’ Perspective Wijayanto, Dimas; Mulyadi, Dodi; Wijayatinningsih, Testiana Deni
E-Structural (English Studies on Translation, Culture, Literature, and Linguistics) Vol. 8 No. 02 (2025): December 2025
Publisher : Universitas Dian Nuswantoro

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Abstract

This research investigates the perspectives of eighth-grade students at SMPN 2 Semarang on the benefits and challenges of mastering English-speaking skills through animated movies. A mixed-method approach was employed in this study, integrating both qualitative and quantitative techniques. Data were collected through closed- and open-ended questionnaires and semi-structured interviews. The questionnaire was distributed to 108 eighth-grade students, while nine students were selected for in-depth interviews. The quantitative data from the questionnaires were analyzed using SPSS to identify statistical trends. At the same time, the qualitative responses from interviews were examined using NVivo software to code and categorize students’ perspectives. This combination provided comprehensive insights into the benefits and challenges of using animated movies in mastering English-speaking skills. The findings revealed that animated movies provided substantial benefits, particularly in enhancing vocabulary acquisition, increasing motivation, improving pronunciation, and boosting students’ self-confidence. Most students expressed that the visual and auditory nature of animated movies made it easier for them to understand and remember new vocabulary, learn correct pronunciation, and practice speaking more enjoyably. Nevertheless, some challenges remained, particularly in mastering grammar and overcoming anxiety when speaking in front of others. Despite these challenges, the study concludes that animated movies are effective and engaging tools for developing speaking skills and recommends their use in the English language learning process. The study's results provide insights for teachers, learners, and educational institutions in selecting appropriate media to support English instruction.  
Co-Authors ., Irfandri Dodi Mulyadi Harahap, Rizki Bintang Ramadhan Herhadi Solihin Irfandri Iswandi Mu'arif, Maulana Rizqi, Alfin Sabirunah, Aisyah Wijayatinningsih, Testiana Deni Yetti Elfina