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Yefta Pamandungan
Jurusan Budidaya Fak. Pertanian, Kampus Unsrat Kleak Manado 95115
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Eksplorasi Plasma Nutfah Jagung Manado Kuning di Sulawesi Utara (The Exploration of Manadonese Yellow Maize Germplasm inNorth Sulawesi Runtunuwu, Semuel D.; Pamandungan, Y.; Mamarimbing, R. Mamarimbing
JURNAL BIOS LOGOS Vol 4, No 2 (2014): JURNAL BIOSLOGOS
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/jbl.4.2.2014.6353

Abstract

Abstrak Penelitian ini bertujuan untuk mengoleksi dan mengevaluasi jagung Manado Kuning berdasarkan karakter morfologi tongkol dan biji. Penelitian dilaksanakan dalam dua tahap, yaitu eksplorasi untuk mengoleksi tongkol jagung Manado Kuning dan evaluasi aksesi jagung Manado Kuning berdasarkan karakter morfologi tongkol dan biji. Eksplorasi dilaksanakan pada akhir bulan Agustus 2013 sampai dengan bulan Desember 2013 di sentra produksi. Sentra produksi adalah daerah yang diketahui secara tradisi menanam jagung Manado Kuning  dan daerah yang menggunakan jagung sebagai makanan pokok. Penentuan desa dilakukan bekerjasama dengan Dinas Pertanian Provinsi Sulawesi Utara dan petugas penyuluh lapangan kabupaten/kota. Hasil koleksi berupa tongkol dibuatkan data paspornya. Karakter morfologi yang diamati meliputi susunan baris dan jumlah baris biji, serta warna dan bentuk biji. Analisis data dilakukan menggunakan Program Software SPSS untuk mengelompokkan aksesi jagung. Eksplorasi menghasilkan 28 aksesi. Berdasarkan evaluasi karakter morfologi tongkol dan biji, pada kesamaan genetik 75 % terdapat 2 kelompok jagung Manado Kuning. Kelompok I terdiri dari 6 aksesi dan kelompok II terdiri dari 22 aksesi. Sesuai dengan deskripsi awal, jagung Manado Kuning dengan karakter biji berwarna kuning dengan tipe biji flint mengelompok sendiri pada kesamaan genetik sekitar 95 %, yaitu kelompok IV yang terdiri dari 13 aksesi. Kata kunci: eksplorasi, karakterisasi, aksesi, jagung Manado Kuning Abstract The purpose of this study was to collect and evaluate Manadonese yellow corn cobs and grain based on the morphological characteristics. The study was carried out in two stages, i.e. the exploration for collecting corn cobs Manado Yellow and the evaluation of accession Manadonese yellow corn based on cobs and grain morphological characteristics. The exploration was conducted between late August 2013 and December 2013 in the production centre. The production centre is the area that is traditionally planted corn yellow Manado and the area that used corn as the staple food. The determination of the location was carried out in collaboration with the Department of Agriculture of North Sulawesi and the district/city extension agents. ​​The passport data was made of the results of the cobs data collection. The evaluated morphological characteristics included the arrangement and the number of the seed row, the color and type of seeds. The data was analyzed using SPSS software program to group maize accessions. The exploration resulted in 28 accessions. Based on the morphological characterization of cobs and seeds at the genetic similarity of 75%, there were 2 groups of Manadonese yellow corn. Group I consisted of 6 accessions and group II consisted of 22 accessions. The same as in the initial description, Manadonese yellow corn with flint grain type was grouped itself in 95% genetic similarity, i.e. the group IV that was consisted of 13 accessions. Kata kunci: accession, characterization, exploration, yellow Manadonese corn
Cultivation Of Corn In The Dry Season Through Community Partnership Program In SMKN PP Kalasey Pamandungan, Yefta; Wanget, Sesilia A.; Doodoh, Beatrix
Jurnal Agroekoteknologi Terapan Vol. 5 No. 1 (2024): EDISI JANUARI-JUNI 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jat.v5i1.53301

Abstract

The Community Partnership Program on Empowerment of SMKN PP Kalasey Students on Maize Cultivation in the Dry Season implemented in Kalasey Satu village, Mandolang District, Minahasa Regency, North Sulawesi, aims to: 1) Increase students' knowledge about corn cultivation in the dry season, 2) Increase students' knowledge about corn cultivation by modifying the planting rows between two varieties of corn, namely sweet corn and purple corn with a ratio of 4:1, 3) Empower educators at SMKN PP Kalasey as facilitators in corn cultivation activities in the dry season. This activity was carried out from September to October 2023 with the methods of agricultural extension, training, and plot demonstration and accompaniment. The program participants were students of SMKN PP Kalasey and were assisted by teachers as facilitators. Based on the results of the activity program, there is a positive impact on improving community values in terms of education in agriculture, increasing the application of science and technology regarding corn cultivation techniques in the dry season, increasing knowledge about corn cultivation techniques by modifying corn planting rows between sweet corn and purple corn to produce consumption materials, namely sweet purple corn, and knowledge about independent seed supply. Keywords: crop cultivation, maize, dry season Abstrak Program Kemitraan Masyarakat (PKM) mengenai Pemberdayaan Siswa SMKN PP Kalasey Mengenai Budidaya Tanaman Jagung Pada Musim Kemarau yang dilaksanakan di desa Kalasey Satu, Kecamatan Mandolang, Kabupaten Minahasa, Sulawesi Utara, bertujuan untuk: 1) Meningkatkan pengetahuan siswa mengenai budidaya tanaman jagung pada musim kemarau, 2) Meningkatkan pengetahuan siswa mengenai budidaya tanaman jagung dengan memodifikasi baris tanam antara dua varietas jagung yaitu jagung manis dan jagung ungu dengan ratio 4:1, 3) Memberdayakan tenaga pendidik (guru) di SMKN PP Kalasey sebagai fasilitator dalam kegiatan budidaya tanaman jagung di musim kemarau. Kegiatan PKM ini dilaksanakan pada September sampai dengan Oktober 2023 dengan metode Penyuluhan, Pelatihan dan Demonstrasi Plot serta Pendampingan. Peserta program PKM yaitu siswa SMKN PP Kalasey dan dibantu oleh para guru sebagai fasilitator. Berdasarkan hasil kegiatan PKM menunjukkan adanya dampak positif bagi perbaikan tata nilai masyarakat dalam hal pendidikan di bidang pertanian, peningkatan penerapan IPTEK mengenai teknik budidaya jagung dimusim kemarau, peningkatan pengetahuan mengenai teknik budidaya jagung dengan memodifikasi baris tanam jagung antara jagung manis dan jagung ungu dalam upaya menghasilkan bahan konsumsi berupa jagung manis berbulir ungu, serta pengetahuan mengenai penyediaan benih secara mandiri. Kata kunci: budidaya tanaman, jagung, kemarau
Kajian Penerapan Teknologi Budidaya Tanaman Dan Produktivitas Padi Sawah (Oryza sativa L.) Di Kecamatan Dumoga Rorong, Feibe; Tumewu, Pemmy; Pamandungan, Yefta
AGRI-SOSIOEKONOMI Vol. 20 No. 1 (2024): Agri-Sosioekonomi
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/agrsosek.v20i1.52324

Abstract

The objective of the study was to assess the application of crop cultivation technology and productivity of paddy rice in Dumoga District, Bolaang Mongondow Regency, North Sulawesi Province. The research was conducted from November to December 2022. The research was located in Dumoga District, Bolaang Mongondow Regency, North Sulawesi Province. This research was qualitative research by conducting surveys and interviews with 30 farmers in Dumoga Subdistrict using a prepared questionnaire, including the identity of farmers, farming conditions and cultivation techniques of paddy rice in Dumoga Subdistrict (North Mopugad Main Village, North Mopugad 1, North Mopugad, South Mopugad, South Mopugad 1, South Mopuya, and Amertabuana). The research location was determined by purposive sampling, namely Dumoga Sub-district, Bolaang Mongondow Regency, with the consideration that the area is the center of paddy rice production in North Sulawesi. The data analysis used was a qualitative descriptive analysis technique. The data obtained were then processed and tabulated in the form of tables and diagrams. The results showed that the application of paddy rice cultivation technology carried out by farmers in Dumoga District included the application of land preparation using a hand tractor, a single planting pattern, a direct seed planting system of direct seed planting (Tabela), the spacing used was 20×20 cm, fertilization using fertilizers (Urea, Phonska, TSP and SP36), water sources came from irrigation irrigation, pest control using pesticide active ingredients and harvesting already using harvesting machines, and paddy rice production in Dumoga District reached 4 tons of GKG, with a productivity of 1.6 tons/ha.
PENGELOMPOKAN PALA SIAU (Myristica fragrans Houtt) BERDASARKAN KARAKTER BUAH, BIJI, DAN FULI Runtunuwu, Semuel D.; Mamarimbing, Rinny; Pamandungan, Yefta; Horonis, Seistelin
AGRI-SOSIOEKONOMI Vol. 18 No. 2 (2022)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/agrsosek.v18i2.55221

Abstract

This research was conducted to clustering Siau nutmeg based on the characters of fruit weight, fruit length, fruit width, flesh thickness, seed weight, seed length, seed width, and mace weight. The research was conducted using the Survey Method. The survey was conducted in nutmeg gardens owned by farmers in the village: 1) Dompas, 2) Kanawong, 3) Tanaki, 4) Deahe, 5) Bahu, 6) Lagaeng, 7) Dame, 8) Batusenggo, 9) Batubulan, and 10) Pangilolong . Determination of village based on harvested area. The data were analyzed in clusters using the SPSS Statistical Analysis Program. The grouping was done using the agglomerative method. The two most similar populations of nutmeg will be grouped into one, then will be grouped again with other populations that are most similar. Based on the character of the fruit, seeds, and mace, Siau nutmeg can be grouped into three groups. Group 1 consists of Bahu, Lagaeng, Dame, and Batusenggo populations. Nutmeg in these villages has a fruit weight of 55.7 g, an average seed weight of 9.9 g and a mace weight of 1.5 g. Group 2 consisted of Dompas, Kanawong, Tanaki, and Deahe populations. Nutmeg in these villages has a fruit weight of 46.2 g, an average seed weight of 8.3 g, and a mace weight of 1.7 g. Group 3 consisting of Batubulan and Pangilolong populations. Nutmeg in these villages has a fruit weight of 35.80 g, a seed weight of 6.6 g, and a mace of 1.04 g.
Application of Local Bacillus Thuringiensis Isolates as Biopesticides for Control of Spodoptera Frugiperda in Maize Salaki, Christina Leta; Makal, Henny V.; Paat, Frangky J.; Pamandungan, Yefta
Jurnal Agroekoteknologi Terapan (JAT) Vol. 7 No. 1 (2026): ISSUE JANUARY-JUNE 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jat.v7i1.66642

Abstract

The fall armyworm, Spodoptera frugiperda, is an invasive pest that threatens maize production and can increase dependence on synthetic insecticides, highlighting the need for locally effective biological control options. This study screened 24 local Bacillus thuringiensis isolates for insecticidal activity against third instar S. frugiperda using a maize leaf dip feeding bioassay. For initial screening, maize leaf sections were treated with 1.5 × 10⁷ spores mL⁻¹ and offered to larvae (30 larvae per isolate), with mortality recorded up to 72 h. Isolates producing at least 50 percent mortality at 72 h were advanced to pathogenicity testing. Selected isolates were evaluated at five concentrations (1.5 × 10³ to 1.5 × 10⁷ spores mL⁻¹) to estimate LC50 at 72 h, and at 1.5 × 10⁷ spores mL⁻¹ to estimate LT50; parameters were calculated by probit analysis and reported with 95 percent fiducial limits. Ten isolates met the screening criterion, and isolate ITH produced the highest mortality (93.3 percent) at 72 h. ITH also showed the greatest pathogenicity, with an LC50 of 7.5 × 10³ spores mL⁻¹ and an LT50 of 19.5 h, indicating high potency and rapid action relative to other candidates. The results demonstrate substantial variability among local Bt isolates and identify promising strains for further development. Future work should confirm isolate identity, characterize toxin profiles, optimize production and formulation, and validate efficacy and crop protection performance under semi field and field conditions for integration into maize integrated pest management. Keywords: Bacillus thuringiensis; biopesticide; fall armyworm; leaf dip bioassay; maize; Spodoptera frugiperda
Co-Authors Doodoh, Beatrix Frangky J. Paat Horonis, Seistelin Johannes E. X. Rogi Makal, Henny V. Marjam Toding, Marjam Pemmy Tumewu R. Mamarimbing Mamarimbing Rifaine M.N. Erungan, Rifaine M.N. Rinny Mamarimbing Rorong, Feibe Runtunuwu, Semuel Salaki, Christina Leta Semuel D. Runtunuwu Wanget, Sesilia A.