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All Journal International Journal of Biosciences and Biotechnology Proceedings of Annual International Conference Syiah Kuala University - Life Sciences & Engineering Chapter Proceeding International Conference on Global Resource Conservation Biology, Medicine, & Natural Product Chemistry BIOLINK (Jurnal Biologi Lingkungan, Industri, Kesehatan) Jurnal Penelitian Pendidikan IPA (JPPIPA) JMM (Jurnal Masyarakat Mandiri) Ganaya: Jurnal Ilmu Sosial dan Humaniora Martabe : Jurnal Pengabdian Kepada Masyarakat JURNAL AGRICA Jurnal Entomologi Indonesia Jurnal Pembelajaran dan Biologi Nukleus Dinasti International Journal of Education Management and Social Science Community Development Journal: Jurnal Pengabdian Masyarakat AGRISAINS: Jurnal Ilmiah Magister Agribisnis Pelita Masyarakat Jurnal Ilmiah Pertanian ( JIPERTA) Jurnal Ilmiah Agribios Journal of Natural Sciences International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) International Journal of Social Science, Educational, Economics, Agriculture Research, and Technology (IJSET) Mediagro International Journal of Science and Environment Jurnal Multidisiplin West Science
Retna Astuti Kuswardani
Universitas Medan Area
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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Identification Of Types Companion Plants for Aren Plants (Arenga Pinnata Merr) and Agroforestry Patterns of Community Forests Area Darmadi Erwin Harahap; Retna Astuti Kuswardani; Tumpal H.S. Siregar; Muhammad Darwis
Jurnal Penelitian Pendidikan IPA Vol 9 No 11 (2023): November
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i11.4936

Abstract

The aren palm plant is a multi-purpose plant, where almost all parts of this plant can be utilized. One of them is nira water which can be used as sugar. his study aims to identify types of companion plants for sugar palm and agroforestry patterns used in community forests in South Tapanuli Regency. The research method used in this study was a field survey in three villages that have community forests. The results showed that there were 17 types of companion plants growing around the sugar palm plants. The pattern of the agroforestry system that occurs in the forests of South Tapanuli Regency is natural. The results showed that coffee plants were dominated in Simaninggir and Bulu Mario villages, while in Aek Nabara village it was dominated by zalacca plants
The Influence of Monoculture and Polyculture Planting Patterns on the Intensity of Pest Attacks by Helopeltis sp. on Arabica Coffee of the Sigarar Utang Variety in North Tapanuli Regency Retna Astuti Kuswardani; Siti Mardiana; Suswati; Saipul Sihotang
Jurnal Penelitian Pendidikan IPA Vol 9 No 12 (2023): December
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i12.5924

Abstract

Coffee is one of the leading commodities in the plantation subsector in North Sumatra which has good market opportunities both domestically and abroad. Especially in the Lake Toba area, apart from the PBKo pest, it turns out that attacks by the coffee leaf sucking pest Helopeltis sp. are also felt to be very important by farmers, because the presence of Helopeltis sp. This causes the coffee leaf shoots to develop brown spots, curl and eventually dry out and die (die back). The aim of the research was to study the symptoms of attacks and the intensity of Helopeltis sp. attacks on Arabica coffee plants in the Lake Toba area, North Tapanuli Regency. This research was carried out on people's coffee plantations in North Tapanuli Regency at an altitude of 1,300 meters above sea level, from February to June 2023. On the Sigarar Utang variety Arabica coffee plantation with monoculture and polyculture planting patterns. The sample plants were determined to be 10% of the total plants at each observation location. Sampling of plant samples is determined using a zig zag line. The parameters observed were the intensity of attacks and the percentage of pest attacks. The results obtained by Helopeltis sp. sucking shoot pests have been known to attack coffee plants in North Tapanuli Regency with symptoms of attack. At the start of the attack, leaf spots are visible, brown, curly and eventually dry out, die back, then grow rosettes, namely shoots, new ones that are shortened tightly and do not develop. The intensity of attacks by Helopeltis sp. on smallholder coffee plantations in North Tapanuli Regency is quite varied, from light to heavy attacks with the intensity of shoot attacks ranging from 15.67% to 57.80%. Monoculture coffee plantations with protective plants, but no pruning, are locations with Helopeltis sp. attack levels in the heavy category with shoot attack intensity reaching 56.66%. The intercropping coffee plant cultivation system (polyculture) had a significant influence on the low intensity of Helopeltis sp. attacks, where tcount (8.921) > ttable (2.306).
Cendawan entomopatogen sebagai penginduksi ketahanan tanaman: Sebuah tinjauan sistematis: Entomopathogenic fungi as plant resistance inducer: A systematic review Vajri, Indri Yanil; Trizelia, Trizelia; Kuswardani, Retna Astuti; Saragih, Magdalena
Jurnal Entomologi Indonesia Vol 21 No 1 (2024): March
Publisher : Perhimpunan Entomologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5994/jei.21.1.75

Abstract

IInsect pathologists' attention to the potential of entomopathogenic fungi (EPF) as inducers of plant resistance has increased in recent years. Several types of EPF that have received attention as biocontrol agents for insect pest populations include Beauveria bassiana, Metarhizium anisopliae and Trichoderma sp. because they are able to infect and kill insects directly, has a wide host range, and has been used to control various types of insect pests. Apart from being able to infect and kill insect pests, EPF can also live endophytically in plant tissue and increase plant resistance to pest attacks. The presence of EPF as endophytes is able to induce plant resistance by stimulating an increase phytohormones production. In this article, we reviewed the role of fungi as entomopathogens, the characteristics of entomopathogenic fungi, and their role as inducers of plant resistance. The review was carried out by collecting information  from original articles and related reports which reviewed the results of research on the role of entomopathogenic fungi as plant resistance inducers by including the keywords entomopathogenic endophytic fungi, resistance induction, characterization, systemic resistance and herbivorous insects. This systematic review concludes that EPF as an inducer of plant resistance is a very promising control alternative in the development of plant protection management against insect pests.
Dampak Keberadaan Pasar Modern terhadap Pendapatan Para Pedagang di Pasar Tradisional di Kabupaten Simalungun Firmansyah, Dimas; Kuswardani, Retna Astuti; Simanullang, Endang Sari
Jurnal Ilmiah Pertanian (JIPERTA) Vol 6, No 2 (2024): Jurnal Ilmiah Pertanian (JIPERTA), September
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jiperta.v6i2.4344

Abstract

Pasar adalah lokasi atau serangkaian kondisi yang mempertemukan pembeli dan penjual semua jenis barang yang sama dengan pasar modren dan pasar tradisional. Pasar modern (indomaret dan alfamart) adalah pasar di mana produk dijual dengan harga yang tepat dan layanan swalayan disediakan dan tidak adanya proses tawar menawar.Pasar tradisional adalah tempat bertemunya penjual dan pembeli ditandai dengan transaksi atau tawar menawar antara penjual dan pembeli langsung.Penelitian ini bertujuan untuk: 1) Mengetahui dampak keberadaan pasar modern Alfamart dan Indomaret terhadap pasar tradisional di Kabupaten Simalungun, 2) Mengetahui apakah keberadaan pasar modern Alfamart dan Indomaret menyebabkan turunnya Pendapatan pasar tradisional di Kabupaten simalungun. Metode yang digunakan dalam pengambilan sampel ini adalah sampling jenuh atau sensus. Dalam penelitian ini karena jumlah populasinya sedikit (terbatas) sehingga tidak memungkinkan untuk menggunakan sampel, sehingga peneliti mengambil jumlah sampel sama dengan jumlah populasi atau disebut dengan sensus yaitu jumlah pedagang sebanyak 30 orang. Terdiri dari pedagang sembako sebanyak 30 orang, 1 konsumen pasar modern dan 1 konsumen pasar tradisional. Hasil menujukkan bahwa dampak keberadaan pasar modern Alfamart dan Indomaret terhadap pasar tradisional di ketiga kecamatan kabupaten simalungun yaitu pendapatan pedagang pasar tradisional sebelum pasar modern yaitu Rp3.777.000/bulan turun menjadi Rp1.406.334/bulan.Sedangkan dampak bagi pedagang sembako yakni mengalami turunnya omset dan berkurangnya konsumen. Oleh karena itu, keberadaan Alfamart dan Indomaret menyebabkan menurunnya volume bahan pangan yang terjual di pasar tradisional.
STUDI KASUS IMPLEMENTASI PENGELOLAAN OPT DALAM RANGKA KEBERLANJUTAN EKOSISTEM PERTANIAN SERTA KAITANNYA TERHADAP PERAN PENYULUH DAN PRODUKTIVITAS PADI SAWAH DI KABUPATEN ASAHAN Eryanto, Okto; Kuswardani, Retna Astuti; Noer, Zulhery
MEDIAGRO Vol 20, No 1 (2024): MEDIAGRO
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/mediagro.v20i1.10425

Abstract

Plant Pest Organisms play an important role in plant growth and productivity. Therefore, the role of extension workers is very important in encouraging farmers to adopt sustainable management of plant pest organisms. The analytical method used was a descriptive research method with a case study approach in three rice production center sub-districts, Asahan Regency with a total sample of 368 farmers. The research results found that farmers have carried out sustainable management of Plant Pest Organisms and achieved a balance effectiveness in controlling pests and environment.
Analysis of Land Suitability for Arabica Coffee in Toba Regency, North Sumatra, Indonesia Nora, Silvia; Kuswardani, Retna Astuti; Mawardi, Surip; Wijoyo, Hadi; Gandaseca, Seca; Novita, Aisar
International Journal of Biosciences and Biotechnology Vol 11 No 1 (2023): International Journal of Biosciences and Biotechnology
Publisher : Central Laboratory for Genetic Resource and Molecular Biology, Faculty of Agriculture, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/IJBB.2023.v11.i01.p07

Abstract

Coffee is a mainstay plantation commodity in Toba Regency which is managed independently by the community where the land around the Lake Toba area is one of the potential lands in Toba Regency for developing Arabica coffee commodities because geographically Toba Regency is located at an altitude of 900 meters to 2,200 meters above sea level and directly borders Lake Toba. The strong roots of coffee plants make this plant one of the mainstays in preserving forests, restoring critical land, preventing erosion and flooding during the rainy season. The aim of this research is to analyze the land suitability of Arabica coffee plantations in Toba Regency. The method used to analyses the land suitability by using the matching method which was carried out by matching land characteristics with parameters/ criteria for plants based on Land Map Unit (LMU). The research results show that the area of Toba Regency based on the Geographic Information System (GIS) is 207,518.31 ha. Very suitable (S1) land suitability for Arabica Coffee Plants covering an area of 67,844.68 ha (32.69%), an area of 132,030.09 ha (63.62%) has S2 suitability class and an area of 7,643.54 ha (3.68%) has marginal suitability (S3). The potential land suitability class for coffee plants in Toba Regency becomes very suitable (S1) covering an area of 67,844.68 ha or 32.69%, moderate suitable class (S2) with temperature limitation covering an area of 132,030.09 ha (63.62%) and marginal suitability (S3 with temperature limitation) covering an area of 7,643.54 ha or 3.68%. Nutrient deficiencies were corrected by adding phosphorus (P) fertilizer of 4.19 kg P/ha or 9.31 kg SP36/ha or 11.63 kg TSP/ha. Nitrogen (N) fertilizer is 75 kg N/ha or the equivalent of 166,625 Kg Urea/ha. Potassium (K) fertilizer as much as 3 kg KCl/ha. Compost fertilizer is 10.56 tons of compost/ha.
Cendawan entomopatogen sebagai penginduksi ketahanan tanaman: Sebuah tinjauan sistematis: Entomopathogenic fungi as plant resistance inducer: A systematic review Indri Yanil Vajri; Trizelia Trizelia; Retna Astuti Kuswardani; Magdalena Saragih
Jurnal Entomologi Indonesia Vol 21 No 1 (2024): March
Publisher : Perhimpunan Entomologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5994/jei.21.1.75

Abstract

IInsect pathologists' attention to the potential of entomopathogenic fungi (EPF) as inducers of plant resistance has increased in recent years. Several types of EPF that have received attention as biocontrol agents for insect pest populations include Beauveria bassiana, Metarhizium anisopliae and Trichoderma sp. because they are able to infect and kill insects directly, has a wide host range, and has been used to control various types of insect pests. Apart from being able to infect and kill insect pests, EPF can also live endophytically in plant tissue and increase plant resistance to pest attacks. The presence of EPF as endophytes is able to induce plant resistance by stimulating an increase phytohormones production. In this article, we reviewed the role of fungi as entomopathogens, the characteristics of entomopathogenic fungi, and their role as inducers of plant resistance. The review was carried out by collecting information  from original articles and related reports which reviewed the results of research on the role of entomopathogenic fungi as plant resistance inducers by including the keywords entomopathogenic endophytic fungi, resistance induction, characterization, systemic resistance and herbivorous insects. This systematic review concludes that EPF as an inducer of plant resistance is a very promising control alternative in the development of plant protection management against insect pests.
Variety Study on Germination Power of Palm Seeds (Elaeis guineensis Jacq.) Yabani, Yabani; Kuswardani, Retna Astuti; Susanto, Agus; Sihotang, Saipul
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 10, No 3: Jurnal Pembelajaran Dan Biologi Nukleus November 2024
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v10i3.5913

Abstract

Seeds as planting material play an important role in agricultural development. The high demand for oil palm sprouts causes the long germination time to become an obstacle for consumers and seed producers. The aim of this research is to examine varieties on germination capacity of oil palm seeds. Research was conducted at the PPKS Seed Processing Unit on nine PPKS varieties (Simalungun, PPKS 540, Yangambi, PPKS 239, PPKS 718, Dumpy, Avros, Langkat, and PPKS 540 NG). The parameter observed was the germination power (DB) of the seeds. The treatment given in the germination process for all varieties is carried out to ensure that the environment is favorable for germination (according to the SOP). Observation results showed that PPKS 540 variety had the highest DB (84.9%), followed by Simalungun (81.46%), PPKS 540 NG (75.46%), Langkat (75.43%), Dumpy (73.41 %), PPKS 718 (72.29), Yangambi (68.81%), PPKS 239 (65.74%), and Avros (56.92%). This is thought to be due to the influence of internal factors, related to the conditions of the germinated seeds, both genetics and hormones, as well as external conditions which include optimal water, temperature and oxygen treatment during germination. The results show that the water content (KA) of the seeds in the soaking period (I) was 16-20%, and soaking (II) was 19-22%, all processed seeds were still at a safe level of water content for the process of breaking dormancy of oil palm seeds. The characteristics of parent tree of the seed variety are the cause of differences in seed germination
Study on the Production of Superior Seed Bunches of Oil Palm (Elaeis guineensis Jacq.) (Case Study: Indonesian Oil Palm Research Institute-PPKS Marihat Unit) Yabani, Yabani; Kuswardani, Retna Astuti; Susanto, Agus; Sihotang, Saipul
JURNAL PEMBELAJARAN DAN BIOLOGI NUKLEUS Vol 10, No 2: Jurnal Pembelajaran Dan Biologi Nukleus July 2024
Publisher : Universitas Labuhanbatu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36987/jpbn.v10i2.5882

Abstract

This research aims to examine the production of superior oil palm seed bunches in the PPKS Marihat Unit.Data and information collection is carried out using direct and indirect methods. Field observations carried out include: Area conditions including: topography, soil conditions, Plant conditions including: plant growth, plant population and fruit condition, Technical culture conditions: fertilization, harvesting of seed bunches. Supporting data collected includes: garden production data, rainfall and fertilization data. The research results are bSeveral factors that cause low production include: a) fertilizer amounts that are far from plant needs, given the time, type; b) plant density which is classified as less than optimal due to ganoderma attacks. The number of bunches is the result of plant physiological processes, mainly determined by the ecophysiological conditions of the plant around 24 months before harvest, where the decrease in production in the number of bunches harvested in 2020 is the result of ecophysiological conditions in the form of fertilization which is not appropriate in 2019-2020.
Nira Production In Terms Of Slope Level In South Tapanuli District Erwin Harahap, Darmadi; Astuti Kuswardani, Retna; HS Siregar, Tumpal; Darwis, Muhammad
International Journal of Science and Environment (IJSE) Vol. 4 No. 4 (2024): November 2024
Publisher : CV. Inara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v4i4.115

Abstract

South Tapanuli is located at an altitude of 0 to 1,985 m above sea level, where almost at all levels of this altitude we will find sugar palm plants growing wild. The purpose of this study was to evaluate the relationship between slope gradient and sugar palm plant productivity in South Tapanuli Regency. The research method used was the field survey method on sugar palm stands used as sample plants with various levels of slope gradient. Furthermore, the data obtained in the field were tabulated and processed using linear regression. The results of the study showed that the slope gradient was negatively correlated with sap production, meaning that the higher the slope gradient, the lower the sap production. The highest sap production was found at an altitude of 400 - 800 meters above sea level with a slope gradient of 8 - 15% with a sap production of 14.27 liters / day.
Co-Authors Abdul Rahman Abidah Ayu Aisar Novita alqindi, muhammad iqbal Aminuyati Ariani Safitri, Sri Azwana Azwana Azwana Azwana B. Sengli J. Damanik Bidasari bidasari bidasari, Bidasari Butar-Butar, Alfons Dwi Putra Chairani Hanum Chairani Hanum Dalimunthe, Arpan Darma Bakti Darma Bakti Dewi Siregar, Fitri Yanni E. Harso Kardhinata Effendi, Ihsan Ellen Lumisar Panggabean Emmy Harso Kardhinata Endang Sari Simanullang Erwin Hasibuan Erwin Nyak Akoeb Erwin Nyak Akoeb, Erwin Nyak Erwin Pane, Erwin Eryanto, Okto Eva Sriana Ferdiansyah, Yudi Firmansyah, Dimas Ginting, Dian Dominika br Ginting, Natal Haliatur Rahma, Haliatur Hanny Hafiar Harahap, Abdul Anas Harahap, Darmadi Erwin Hasanuddin Hasanuddin Hasibuan, Syahbuddin Hernosa, Siswa Panjang HS Siregar, Tumpal Ida Ayu Putu Sri Widnyani Ida Sari Siregar Ika Listiana Indah Apriliya Indri Yanil Vajri Irawan, Maya Novita Sari Lamria Sidauruk Lubis, Susilawati M. Akbar Siregar Magdalena Saragih Maya Novita Sari Irawan Mitra Musika Lubis Muhammad Darwis Muhammad Deaprama Aydra Muhammad Reza Aulia Napitupulu, Beatrix Sofranes Nasution, Jamilah Nasution, Lita Natal Ginting Nina Salmaniah Siregar Noer, Zulhery Nurhidayana Nurhidayana Nurhidayana, Nurhidayana Puspita, Diah Eka Rahmad Fauzi Rahmad Syah, Rahmad Rahmanta Rahmanta, Rahmanta Ramadhana, Muhammad Bobby Saipul Sihotang Saipul Sihotang Saipul Sihotang, Saipul Salqaura, Siti Sabrina Saragih, Bahdan Saragih, Magdalena Sartini Sartini Sarumaha, Agustinus Seca Gandaseca Seri Sekar Sari Setya, Rezki Tri Silvia Nora, Silvia Sina sina Sina sina, Sina Siregar, Agus Saputra Siregar, Awaluddin M Siregar, M. Akbar Siregar, Nina Salmaniah Siti Mardiana Situmorang, Sudiwan Sri Milfayetty Surip Mawardi Suswati Syahbudin Hasibuan, Syahbudin Taufik Siregar Trizelia . Tumpal H.S. Siregar Vajri, Indri Yanil Wijoyo, Hadi Wiwik Handayani Yabani, Yabani Yusniar Lubis Zahari Zen Zul Fadhly Zul Fadhly