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Bacteria simbion landscape (Oryctes rhinoceros L.) as a bioactivator for oil palm empty fruit bottle for organic mulsa Marheni; Lubis, Lahmuddin
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Oryctes rhinoceros is an important pest in oil palm plants attacking plants and immature plants. Utilization of oil palm empty fruit bunches in the field causes the spread and increase of O. rhinoceros attacks. The phenol compound and phenyl phenol released by decomposed oil palm empty fruit bunch attract O. rhinoceros to the organic material. The process of decomposition of oil palm empty fruit bunches 6-9 months resulted in an increase in pest population. O. rhinoceros larvae have symbiotic bacteria in their intestines and produce hydrolytic enzymes that have the potential and can be developed to degrade oil palm empty fruit bunch waste that is used as a composting starter. composting. The materials used in this study were larvae of O. rhinoceros instar 3, culture media of NA, NB, fungi, trichoderma, yeast and other materials that support the research. Tools used in scalpels, measuring cups, microscopes and others. The study was conducted at the Plant Disease Laboratory and Greenhouse, Agrotechnology Study Program, Faculty of Agriculture, University of North Sumatra, Medan from June 2019 to October 2019. This research used a Non Factorial Complete Randomized Design with 9 treatments and 3 replications. The results of the study were obtained 2 bacterial species namely Achromobacter SP and Bacillus SP then made as a composting activator. The use of this symbiont bacteria influences the physical and chemical factors of compost produced. As for physically obtained compost color in the treatment of P8 7.5 YR 2/1 (Black) while P0 7.5 YR 3/2 (Dark Brown). Compost has a soil aroma and temperature. Material reduction during composting from all treatments averaged 42.14%. The best C / N ratio is in the treatment of P7 (Bacillus + molasses) that is equal to 14.78% and the composting process lasts for 10 weeks.

Biologi Fall Armyworm (Spodoptera frugiperda J. E. Smith) (Lepidoptera: Noctuidae) di laboratorium Hutagalung, Rade Putra Satrio; Sitepu, Suzanna Fitriany; Marheni
Jurnal Online Pertanian Tropik Vol. 8 No. 1 (2021): JURNAL ONLINE PERTANIAN TROPIK
Publisher : Talenta Publisher

Spodoptera frugiperda J. E. Smith (Lepidoptera: Noctuidae) merupakan hama invasif baru yang menyebabkan kerusakan parah pada pertanaman jagung di beberapa daerah di Indonesia. S. frugiperda juga telah menyerang pertanaman jagung di Sumatera Utara berdasarkan data yang diperoleh dari Balai Perlindungan Tanaman Pangan dan Hortikultura (BPTPH) Sumatera Utara dan pengamatan di lapangan. Penelitian ini bertujuan untuk mempelajari beberapa aspek biologi Fall Armyworm (S. frugiperda) pada tanaman jagung. Penelitian ini dilaksanakan mulai bulan Januari 2020 sampai Maret 2020 di Laboratorium Hama Tanaman, Fakultas Pertanian, Universitas Sumatera Utara. Hasil penelitian menunjukkan bahwa siklus hidup S. frugiperda berkisar antara 38-45 (41,4Â±1,73) hari: telur menetas setelah 2 hari, larva instar pertama 2-3 (2,75Â±0,44) hari, larva instar kedua 3-4 (3,80Â±0,41) hari, larva instar ketiga 3-4 (3,80Â±0,41) hari, larva instar keempat 3-4 (3,70Â±0,47) hari, larva instar kelima 2-3 (2,70Â±0,47) hari, larva instar keenam 2-3 (2,30Â±0,47) hari dan pupa 8-10 (8,90Â±0,64) hari. Umur Imago betina 9-11 (10,20Â±0,92) hari sedangkan umur imago jantan 9-10 (9,20Â±0,42) hari. Imago betina selama hidupnya dapat menghasilkan telur 1063-1902 (1468,2Â±255,70) butir. Perbandingan nisbah kelamin S. frugiperda jantan : betina adalah 1 : 1,25. Kata kunci : biologi, jagung, Spodoptera frugiperda

Diversity Index of Insect Species on Sorghum Plantations in Kolam Village, Percut Sei Tuan District, Deli Serdang Tarihoran, Parlindungan; Siregar, Ameilia Zuliyanti; Marheni
Indonesian Journal of Agricultural Research Vol. 3 No. 2 (2020): InJAR, Vol. 3, No. 2, July 2020
Publisher : Talenta Publisher

This research aimed to know the diversity of insects of sorghum plantations and the status of insect functions in sorghum plants. The purposive sampling method were done, which used 4 traps, consist of yellow sticky trap, sweep net, pitfall trap and light trap for 8 observations research were done from May to September 2019 at Kolam Village, Percut Sei Tuan District of Deli Serdang Regency, then continue to identified in Pest Laboratory Faculty of Agriculture University of Sumatera Utara, Medan. The results showed that there were 117 individuals insects which consist of 10 orders and 33 families. The highest relative density was 14.74% and the lowest was 0.42% sere recorded, while the highest relative frequency was 4.08% and the lowest was 1.53%. The value of insect diversity index was 3.115 (High), it is mean the diversities of insects varied and the habitat was good for growth of insects. The value of evenness index was 0.891 (high) and richness index was 4.15 (high). The dominant insects recorded from Order of Hymenoptera (Family of Formicidae), continued to Coleoptera (Family of Scarabaeidae; Coccinellidae) are quite diverse in the sorghum plantations. The function status of insects was recorded as herbivores, parasitoids, predators, pollinators and decomposer were determined.

THE INFLUENCE OF MEDIA PUBLICATIONS, ENVIRONMENTAL PERFORMANCE, LEVERAGE AND INDUSTRY TYPE ON CARBON EMISSION DISCLOSURE Marheni; Holiawati; Endang Ruhiyat
International Journal of Accounting, Management, Economics and Social Sciences (IJAMESC) Vol. 3 No. 1 (2025): February
Publisher : ZILLZELL MEDIA PRIMA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61990/ijamesc.v3i1.456

Carbon emissions are the release of carbon gas into the atmosphere, which can arise as a result of a company's operational activities. Disclosure of carbon emissions is a form of responsible practice for environmental aspects carried out by companies. However, there are still companies that do not disclose carbon emission disclosure items. This research aims to examine the influence of Media Publications, Environmental Performance, Leverage and industry type on Carbon Emission Disclosure in energy sector companies listed on the Indonesia Stock Exchange. This research uses an associative quantitative approach. The type of data used is secondary data obtained from www.idx.co.id and the company website. The population in this research is Energy Sector Companies Registered on the IDX for the 2019 - 2023 Period. Meanwhile, the sample for this research was determined using a purposive sampling method so that 20 sample companies were obtained. The analytical method used is Panel Data Model Regression analysis. Data analysis used EViews version 12. The results of this research show that Media Publications, Environmental Performance and Leverage influence Carbon Emission Disclosure, while Industry Type has no influence on Carbon Emission Disclosure. It is hoped that this research can be used as additional information in making investment decisions, especially on environmental performance variables that influence the disclosure of carbon emissions. The limitations of this research are shown by the Adj R-Squred size of 18%. Therefore, it is recommended that future researchers re-examine other factors that have the potential to be determinants of carbon emissions disclosure besides the research variables.

Bacteria simbion landscape (Oryctes rhinoceros L.) as a bioactivator for oil palm empty fruit bottle for organic mulsa Marheni; Lubis, Lahmuddin
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Oryctes rhinoceros is an important pest in oil palm plants attacking plants and immature plants. Utilization of oil palm empty fruit bunches in the field causes the spread and increase of O. rhinoceros attacks. The phenol compound and phenyl phenol released by decomposed oil palm empty fruit bunch attract O. rhinoceros to the organic material. The process of decomposition of oil palm empty fruit bunches 6-9 months resulted in an increase in pest population. O. rhinoceros larvae have symbiotic bacteria in their intestines and produce hydrolytic enzymes that have the potential and can be developed to degrade oil palm empty fruit bunch waste that is used as a composting starter. composting. The materials used in this study were larvae of O. rhinoceros instar 3, culture media of NA, NB, fungi, trichoderma, yeast and other materials that support the research. Tools used in scalpels, measuring cups, microscopes and others. The study was conducted at the Plant Disease Laboratory and Greenhouse, Agrotechnology Study Program, Faculty of Agriculture, University of North Sumatra, Medan from June 2019 to October 2019. This research used a Non Factorial Complete Randomized Design with 9 treatments and 3 replications. The results of the study were obtained 2 bacterial species namely Achromobacter SP and Bacillus SP then made as a composting activator. The use of this symbiont bacteria influences the physical and chemical factors of compost produced. As for physically obtained compost color in the treatment of P8 7.5 YR 2/1 (Black) while P0 7.5 YR 3/2 (Dark Brown). Compost has a soil aroma and temperature. Material reduction during composting from all treatments averaged 42.14%. The best C / N ratio is in the treatment of P7 (Bacillus + molasses) that is equal to 14.78% and the composting process lasts for 10 weeks.

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