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Comparison of MobileNet and VGG16 CNN Architectures for Web-based Starfish Species Identification System Latumakulita, Luther Alexander; Paat, Frangky J.; Saroyo, Saroyo; Karim, Irwan; Astawa, I Nyoman Gede Arya; Sirait, Hasanuddin
Journal of Applied Data Sciences Vol 5, No 4: DECEMBER 2024
Publisher : Bright Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47738/jads.v5i4.456

Abstract

Bunaken Marine Park (BMP) is famous for its rich marine biodiversity. BMP is an asset for the marine tourism industry of the Manado city government, and the North Sulawesi Province of Indonesia needs to be strengthened. This research aims to build a web-based intelligent system using a convolutional neural network (CNN) to identify starfish species to initiate developing a media center marine biota identification system of BMP. Two CNN architectures, namely MobileNet and VGG16, were conducted to produce identification models. The first stage carried out a training process on 1800 starfish image data and then evaluated using the 5-fold cross-validation technique. Validation results show that MobileNet is superior to the VGG16 architecture by achieving validation accuracy of 100% for each fold while VGG16 produces validation accuracy in the range of 94% to 100%. On the other hand, in the second stage of model testing, it was found that VGG16 worked better than MobileNet in identifying 200 new data. The Best Model produced by VGG16 achieved testing accuracy of 100% while MobileNet produced 99.5%. However, stability analysis of the identification models produced by both architectures shows that MobileNet has relatively small loss values ranging from 0.00069325 to 0.00214802 as well as smaller standard deviation values of 0.27 compared to 0.61 produced by VGG16. These findings indicate MobileNet is more stable in carrying out identification work compared to VGG16 of, thus the best model provided by MobileNet is taken to deploy in the web platform which is created using the Python flask framework. The proposed system can be used to strengthen the marine tourism industry as a media center of educational marine biota using deep learning approaches.
Effect of Temperature and Extraction Time on the Yield, Water Content, and Methoxyl of Coconut Fiber Pectin Paat, Frangky J.; Lamaega, Jolanda Ch. E.; Mamuaja, Christine Fransin; Lumuindong, Frans; Rorong, Frangky
Journal of Agriculture Vol. 2 No. 03 (2023): Research Articles, November 2023
Publisher : ITScience (Information Technology and Science)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47709/joa.v2i03.3217

Abstract

This research aims to see the effect of temperature and extraction time on water content, yield and methoxyl content of coconut fiber pectin. This research was carried out experimentally factoril in Design Random Complete, which consists two treatment that is temperature extraction and extraction time with three repetitions. The results of this research show that treatment temperature extraction very influence yield pectin, rate water and methoxyl pectin while the extraction time affects the water content of the pectin. At a temperature of 70 O C and long extraction 60 minutes obtained the highest average yield of pectin, namely 4.31%, while the average the lowest pectin yield was obtained from treatment with an extraction temperature of 90 ° C and an extraction time of 90 minute. Average rate methoxyl highest obtained from treatment temperature 70 O C and long extraction 30 minute, whereas average percent rate methoxyl Lowest obtained from treatment with an extraction temperature of 90 O C and an extraction time of 90 minutes, namely 8.03% and 7.61% respectively. From the results obtained, it was concluded that the pectin obtained was classified as deep pectin group with high methoxyl content, namely >7%. Average percent of pectin content The lowest was 90 O C and the extraction time was 90 minutes, namely 10.19%, while the highest obtained from treatment with an extraction temperature of 70 O C and an extraction time of 30 minutes. From the results of the analysis this water content means that the water content of the coconut fiber pectin obtained is deep study this has fulfil condition for water content dry pectin that is 10-14%.
Pelatihan Teknologi PHT Cabai Merah pada Kelompok Tani Zanonewuku di Kota Tomohon Baideng, Eva Lienneke; Paat, Frangky J.; Rumende, Roiije R.H.; Butarbutar, Regina R.
Jurnal Pengabdian Masyarakat: Pemberdayaan, Inovasi dan Perubahan Vol 4, No 6 (2024): JPM: Pemberdayaan, Inovasi dan Perubahan
Publisher : Penerbit Widina, Widina Media Utama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59818/jpm.v4i6.880

Abstract

The Zanonewuku farmer group is in Matani Dua Village, which is one of the horticultural centers in Tomohon City. Commodities grown by this farmer group include red chilies (Capsicum annum). The use of chemicals in agricultural activities is still a mainstay for farmers in maximizing agricultural yields. Chemical pesticide spraying is carried out routinely 2 to 3 times every week. Unwise use of chemical pesticides can damage the environment and the final product produced contains excessive chemical residues. The aim of this community service activity is to provide outreach and training regarding integrated pest management (IPM) in chili cultivation. Socialization in the form of education about integrated pest and disease control techniques (IPM) for chili plants using biological materials and the impact of excessive use of chemical pesticides if used in the long term. The training carried out included making soursop leaf extract vegetable pesticides and making trichoderma which is a biological fertilizer and biofungicide. From this activity, farmers gain increased knowledge and skills about alternative uses of natural ingredients in making pesticides and trichoderma.ABSTRAKKelompok tani Zanonewuku berada di Kelurahan Matani Dua, yang merupakan salah satu sentra hortikultura di Kota Tomohon. Komoditas yang ditanam pada kelompok tani ini termasuk cabai merah (Capsicum annum). Penggunaan bahan kimia dalam kegiatan pertanian masih menjadi andalan petani dalam memaksimalkan hasil pertanian. Penyemprotan pestisida kimia dilakukan secara rutin sebanyak 2 hingga 3 kali setiap minggu. Penggunaan pestisida kimia yang kurang bijak dapat merusak lingkungan dan produk akhir yang dihasilkan mengandung residu kimia yang berlebihan. Tujuan kegiatan pengabdian kepada masyarakat ini adalah memberikan sosialisasi dan pelatihan terkait pengendalian hama secara terpadu (PHT) pada budi daya cabai. Sosialisasi berupa penyuluhan tentang teknik pengendalian hama penyakit secara terpadu (PHT) tanaman cabai menggunakan bahan hayati dan dampak penggunaan pestisida kimia secara berlebihan jika digunakan dalam jangka panjang. Pelatihan yang dilakukan meliputi pembuatan pestisida nabati ekstrak daun sirsak dan pembuatan trichoderma yang merupakan pupuk hayati dan biofungisida. Dari kegiatan ini petani mendapatkan peningkatan pengetahuan dan ketrampilan tentang alternatif pemakaian bahan alami dalam membuat pestisida maupun trichoderma.
Entomopathogenic Fungi Efficacy Test Beauveria bassiana (Bals) Vuill on Spodoptera exigua (Hubner) Larvae Mortality in Scallion Plants Manurung, Putra; Tarore, Dantje; Paat, Frangky J.; Watung, Jackson F.
Jurnal Agroekoteknologi Terapan (Applied Agroecotechnology Journal) 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.v7i1.52173

Abstract

Spodoptera exigua, a member of the Lepidoptera order and the Noctuidae family, has the ability to rapidly attack leek plants (Allium fistulosum L.). The goal of this study was to use B. bassiana on A. fistulosum to determine the death rate of S. exigua larvae. A completely randomized design (CRD) was used, with four treatments: P0 (control), P1 (conidia concentration 106/ml), P2 (conidia concentration 107/ml), and P3 (conidia concentration 108/ml). Repeat four times. Each replication consisted of ten larvae. A total of 160 S. exigua larvae were required. The observation findings showed that each concentration had a different LT50 value. Based on the LT50 data, treatment with a concentration of 108/ml effectively suppressed 50% of the larvae within 4 days. Significant temporal differences were detected for each conidia concentration. On the fourth day after application, a high mortality rate was observed in treatment P3 (conidia concentration of 108/ml), indicating a consistent daily larval mortality rate. The attack intensity reached 30% in just four days with a conidia concentration of 108/ml (P3), followed by P2 (107/ml) and P1 (106/ml). The mortality rate of S. exigua larvae increases linearly with conidia concentration. Keywords: Spodoptera exigua, Beauveria bassiana, Allium fistulosum L.   Abstrak. Spodoptera exigua tergolong ordo Lepidoptera, famili Noctuidae. S. exigua dapat menyerang tanaman tanaman bawang daun (Allium fistulosum L.) dengan cepat dalam waktu yang singkat. Tujuan penelitian ini adalah aplikasi B. bassiana pada A. fistulosum untuk mendapatkan tingkat mortalitas larva S. exigua. Completely randomized design (RAL) 4 perlakuan, terdiri atas: P0 (control), P1 (konsentrasi konidia 106/ml), P2 (konsentrasi konidia 107/ml), dan P3 (konsentrasi konidia 108/ml). Ulangan empat kali. Sampel disetiap ulangan terdiri atas 10 larvae. Total larvae yang diperlukan yaitu sebanyak 160 larva S. exigua. Hasil pengamatan mengindikasikan bahwa setiap konsentrasi memiliki nilai LT50 yang bervariasi. Dari data LT50 yang diperoleh, perlakuan dengan konsentrasi 108/ml sangat cepat mengendalikan 50 persen larvae dalam waktu 4 hari. Perbedaan waktu signifikan disetiap konsentrasi konidia yang diterapkan. Pada hari keempat setelah aplikasi, tingkat mortalitas yang signifikan terjadi pada perlakuan P3 (konsentrasi konidia 108/ml), menunjukkan tingkat mortalitas larva yang stabil setiap harinya. Intensitas serangan mencapai 30% hanya dalam empat hari dengan penggunaan konsentrasi konidia 108/ml (P3), selanjutnya P2 (konidia 107/ml), dan P1 (konidia 106/ml). Semakin tinggi konsentrasi konidia linier terhadap mortalitas level larva S. exigua. Kata kunci: Spodoptera exigua, Beauveria bassiana, Allium fistulosum L.
Types And Populations of Pests on Cabbage Plants Which Are Planted Intercropping with Mustard Greens Refugia Wanta, Noni N.; Dumalang, Sherlij; Paat, Frangky J.; Paruntu, Meisye H. B.
Jurnal Agroekoteknologi Terapan (Applied Agroecotechnology Journal) Vol. 6 No. 2 (2025): ISSUE JULY-DECEMBER 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jat.v6i2.52482

Abstract

The purpose of this study is to determine the types and populations of pests in cabbage plants planted intercropping with mustard greens in Kakaskasen I Village, Tomohon City. The research method used is a survey method on experimental land made without the use of pesticides. Data collection was carried out on 3 observation plots with the number of sample plants in each plot was 30 plants. Observation of pest types and populations on cabbage plants is carried out every 2 weeks from the age of cabbage plants 2 weeks after planting to harvest. The data obtained were analyzed descriptively about the types and populations of pests in cabbage plants. The results of this study found that the main pests that attack cabbage plants that are planted intercropped with mustard greens are Plutella xylostella and Crocidolomia binotalis. The population of P. xylostella pests in cabbage plants is low on average ranging from 0.002 to 0.067 larvae/plant, while the population of C. binotalis pests is high with an average range of 0.056 to 1,422 larvae per plant. It is necessary to preserve the parasitoid D. semiclausum to control the pest of P. xylostella and find environmentally friendly pest control solutions of C. binotalis to produce healthy cabbage production. Keywords: Cabbage, Mustard greens, Population, Pests, Parasitoid Abstrak. Tujuan dari penelitian ini adalah untuk mengetahui jenis dan populasi hama pada tanaman kubis yang ditanam tumpangsari dengan refugia sawi hijau di Desa Kakaskasen I Kota Tomohon.  Metode penelitian yang digunakan adalah metode survei pada lahan percobaan yang dibuat tanpa menggunakan pestisida.  Pengambilan data dilakukan pada 3 plot pengamatan dengan jumlah tanaman sampel masing-masing plot adalah 30 tanaman.  Pengamatan jenis dan populasi hama pada tanaman kubis dilakukan setiap 2 minggu sekali sejak tanaman kubis berumur 2 minggu setelah tanam sampai panen. Data yang diperoleh dianalisa secara deskriptif tentang jenis dan populasi hama pada tanaman kubis. Hasil penelitian ini ditemukan hama utama yang menyerang tanaman kubis yang ditanam tumpang sari dengan refugia sawi hijau adalah hama Plutella xylostella dan Crocidolomia binotalis.   Populasi hama P. xylostella pada tanaman kubis rendah berkisar rata-rata 0.002 – 0.067 larva/tanaman, sedangkan populasi hama C. binotalis tinggi dengan rata-rata berkisar 0.056 sampai 1.422 larva per tanaman.  Perlu melestarikan parasitoid D. semiclausum untuk mengendalikan hama P. xylostella dan mencari solusi pengendalian hama C. binotalis yang ramah lingkungan untuk menghasilkan produksi kubis yang sehat. Keywords: Kubis, Sawi Hijau, Refugia, Hama, Parasitoid
Effects of Polyembryonic Seed Types on Early Seedling Growth of Duku (Lansium domesticum Corr) Walingkas, Stanley A. F.; Tumewu, Pemmy; Rantung, Meity R.; Sintaro, Sanriomi; Paat, Frangky J.
Jurnal Agroekoteknologi Terapan (Applied Agroecotechnology Journal) Vol. 6 No. 2 (2025): ISSUE JULY-DECEMBER 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jat.v6i2.58464

Abstract

Duku (Lansium domesticum Corr.) is an important tropical fruit tree in Indonesia, but the supply of uniform and vigorous planting material for orchard establishment remains limited. Polyembryony in duku seeds offers a potential source of clonal seedlings, yet the effects of different polyembryonic seed types and handling methods on seedling vigor are not well documented. This study evaluated early seedling growth of duku derived from zygotic and polyembryonic seeds under farmer managed nursery conditions in Eris Village, North Sulawesi. A randomized complete block design was used with five seed treatments and four replications: zygotic seed with a single embryo (Z1), intact polyembryonic seeds with two embryos (PU2), intact polyembryonic seeds with three embryos (PU3), polyembryonic seeds cut into two sections (PB2), and polyembryonic seeds cut into three sections (PB3). At the end of the nursery phase, number of leaves, plant height, stem diameter, leaf area, and root weight were recorded and analyzed by analysis of variance followed by the least significant difference test at the five percent level. Seed type significantly affected all traits. Zygotic seeds produced seedlings with the highest leaf number, plant height, stem diameter, leaf area, and root weight. Seedlings from cut polyembryonic seeds (PB2 and PB3) showed intermediate performance, with stem diameter and root weight close to those of zygotic seedlings. In contrast, seedlings from intact polyembryonic seeds with three embryos (PU3) had the lowest leaf number, leaf area, and root weight. These findings indicate that zygotic seeds remain the best option for producing vigorous duku seedlings, while sections of polyembryonic seeds, especially PB2 and PB3, can provide acceptable alternatives when zygotic seeds are limited or when clonal propagation is desired.   Keywords: duku; Lansium domesticum; polyembryonic seeds; seedling vigor; rootstock; nursery management
Moringa (Moringa oleifera L.) Seed Powder as a Bioadsorbent for Heavy Metals in Community Gold Mine Effluent: Implications for Agricultural Water Use Wantasen, Sofia; Tumbelaka, Selvie; Lumingkewas, Adeleyda M. W.; Paat, Frangky J.
Jurnal Agroekoteknologi Terapan (Applied Agroecotechnology Journal) Vol. 6 No. 2 (2025): ISSUE JULY-DECEMBER 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35791/jat.v6i2.65932

Abstract

Gold mining in rural areas can contaminate rivers and canals that are also used for irrigation, creating risks for agricultural water use. This study evaluated Moringa oleifera seed powder as a low-cost bioadsorbent to improve community gold mine wastewater in Bolaang Mongondow Timur, North Sulawesi, Indonesia. Effluent collected at the mine outlet was treated in batch with moringa seed powder at 0, 0.5, 1.0 and 1.5 g L⁻¹. Concentrations of Cd, Cr, Cu, Pb and Hg were measured by atomic absorption spectrophotometry before and after treatment, and summarized together with removal efficiencies and Indonesian effluent standards. A dose of 0.5 g L⁻¹ gave the best apparent reduction for Cd and Cu, while Pb and Hg responded best at higher doses; Cr was only weakly affected, consistent with the limited removal of anionic Cr(VI) by unmodified biosorbents. Overall, moringa seed powder reduced the levels of several cationic metals. It may help lower heavy-metal loads entering agricultural water systems. Still, the non-replicated, descriptive nature of the data means that further replicated and field-based studies are needed before routine irrigation use can be recommended. Keywords: Moringa oleifera; bioadsorbent; gold mine wastewater; heavy metals; irrigation water quality
Development and Performance Evaluation of a Low-Cost, Energy-Efficient Air Fryer Prototype Using Incandescent Bulb Heating for Oil-Free Food Processing Lamaega, Jolanda Ch. E.; Paat, Frangky J.; Sintaro, Sanriomi Sintaro; Saroinsong, Denny
Jurnal Agroekoteknologi Terapan (Applied Agroecotechnology Journal) 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.v7i1.66252

Abstract

Oil-free cooking technologies are increasingly important for promoting healthier diets, reducing dependency on volatile oil markets, and enabling sustainable food processing—particularly in rural and resource-constrained environments. This study presents the design and evaluation of a low-cost air fryer prototype powered by incandescent bulbs (60–150 W), constructed using locally available materials. Thermal performance testing showed that the prototype achieved stable chamber temperatures up to 115 °C, enabling effective oil-free frying of potato slices, banana slices, and chicken nuggets. Frying performance, measured through cooking time, moisture reduction, and sensory evaluation, demonstrated acceptable product quality with significant energy savings: only 25–75 Wh per cycle, roughly one-tenth the energy use of conventional commercial air fryers. The prototype also offers potential as a multifunctional device for dehydration and defrosting, supporting broader postharvest applications in smallholder agritech. These results highlight a promising pathway for low-power, low-cost, and sustainable food processing technologies suitable for deployment in rural communities. Future work will focus on optimizing performance, expanding product capabilities, and validating user acceptance in real-world agritech settings. Keywords: Low-power Air fryer, incandescent bulb heating, oil-free cooking, energy-efficient food processing, sustainable technology.
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 Adeleyda M. W. Lumingkewas Alden M. Saiya Arthur G. Pinaria Badrun Zaini Baideng, Eva Lienneke Bobby J. V. Polii Bobby Polii Christine F Mamuaja Christine F Mamuaja Christine F Mamuaja Daniel Peter Mantilen Ludong Dantje Tarore David P Rumambi David P. Rumambi David S. Runtunuwu Dedie Tooy Deflly Ansye Shilfana Turang Denny Saroinsong Diane D. Pioh Edy F. Lengkong Ekuin Kojong Elpin E. Alom Frangky Rorong Frans Lumuindong Hengkie Walangitan Herry F Pinatik Herry F. Pinatik I Nyoman Gede Arya Astawa Ireine A. Longdong Islam, Noorul Jackson F. Watung James B. Kaligis Jantje Pelealu Jantje Pelealu Jantje Pongoh Jantje Pongoh Jantje Pongoh Jeanne M. Paulus Jeanne Martje Paulus Jelie Viekson Porong Jemmy Najoan, Jemmy Jimmy Rimbing Joachim Y. E. Oessoe Johannes E. X. Rogi Joice Rompas Jolanda Ch. E. Lamaega, Jolanda Ch. E. Jooudie N. Luntungan Juliet M.E. Mamahit Jusuf Manueke Karim, Irwan Langimanapa Sofia Demmassabu Lumingkewas, Adeleyda Lumingkewas, Adeleyda M. W. Lumuindong, Frans Luntungan, Jooudie Luther A. Latumakulita Luther Latumakulita Makal, Henny V. Malintoi, Friska Mamuaja, Christine Fransin Mandagi, Franklin Manurung, Putra Maramis, R.T. D. MARJAM M. TODING Max Tulung Meilani Elseday Ma'tan Melkison Sanggel Nangoi, Ronny Noni N. Wanta Oddi R Pinontoan Ogie, Tommy B. Paruntu, Meisye H. B. Patricia Mandagi Pemmy Tumewu Petrus Adam Pioh, Diane Porong, Jellie Purwanto, Yanuar Jarwadi Rafli I. Kawulusan Rantung, Meity R. Regina R. Butarbutar Rena Paputungan Rinny Mamarimbing Rinny Mamarimbing Rogi, Johannes E. X Rombe, Nadia Jovanka Ronny Nangoi Ronny Nangoi Ronny Soputan Rorong, Frangky Rumende, Roiije R.H. Salaki, Christina Leta Salsabella, Syafira Samuel D. A. Kusuma Sandra E. Pakasi Sandra Pakasi Sandra Pakasi Sanriomi Sintaro Saroyo Saroyo Selvie Tumbelaka Selvie Tumbelaka Semuel D. Runtunuwu Sherlij Dumalang Sintaro, Sanriomi Sintaro Sirait, Hasanuddin Siti Mutmaina Pondaag Sofia Wantasen Suzanne L. Liwu Tambelu, Merry Feiby Tenda, Edwin Tineke M. Langi Titi Candra Sunarti Tommy B Ogie Tommy B. Ogie Tommy B. Ogie Walingkas, Stanley A. F. Wariki , Barce Andries Feriano Watung, Jackson F. Welly A. Kaurow Widiatmaka Widiatmaka Wiske Rotinsulu Wiske Rotinsulu Yefta Pamandungan Yoakhim J.E. Oessoe Yoakhim Y.E. Oessoe