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All Journal Agrikultura Cropsaver : Journal of Plant Protection AGROLAND: The Agricultural Sciences Journal Jurnal ABDINUS : Jurnal Pengabdian Nusantara Sains dan Matematika Agrikultura Masyarakat Tani: Jurnal Pengabdian kepada masyarakat
Sudarjat Sudarjat
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Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Economics, Econometrics & Finance Education Environmental Science Industrial & Manufacturing Engineering Mathematics Physics

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Effectiveness of seed oil formulations of Azadirachta indica (A.) Juss and Barringtonia asiatica (L.) Kurz in controlling aphids (Aphis gossypii glover) on Strawberry (Fragaria x ananassa duch) plants Sudarjat, Sudarjat; Djaya, Luciana; Muhammad, Ardhi
CROPSAVER Vol 6, No 2 (2023)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v6i2.51238

Abstract

Strawberry production is often decreased by plant pest infestation in the field. One of the major pests is Aphis gossypii. Strawberry farmers typically use synthetic chemical pesticides to control aphid, however, this can pose serious environmental and human health problems if done continuously. The use of synthetic chemical pesticides can be minimized by using botanical pesticides, as they are safer for human health and the environment. Botanical pesticides that can be used include neem seed extract (Azadirachta indica) and sea poison tree (Barringtonia asiatica). The objective of this research was to test the effectiveness of neem and sea poison tree seed oil formulations against A. gossypii on strawberry plants. The experiment was conducted at CV Bumi Agro Technology, Lembang, from April 2023 to August 2023, arranged in the randomized complete block design consisting of 7 treatments with 4 replications. The treatments were application of neem and sea poison tree seed oil at different concentrations, as follow: (A) Control, (B) Abamectin 0.15%, (C) Neem Oil 2%, (D) Neem seed oil 50 EC 2%, (E) Neem seed oil 50 EC 1%, (F) Sea poison tree seed oil 30 SC 2%, and (G) Sea poison tree seed oil 30 SC 1%. The results showed that neem and sea poison tree seed oil formulations at the concentration of 2% were effective in controlling A. gossypii on strawberry plants.
Identification of Invasive Aliens Plant Species in Cultivated Area of Kamojang Crater at Ibun District, Bandung Regency, West Java Rasiska, Siska; Asdak, Chay; Parikesit, Parikesit; Sudarjat, Sudarjat; Gunawan, Budhi; Setiawan, Iwan; Setiawan, Ditriz
CROPSAVER Vol 6, No 1 (2023)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v6i1.45383

Abstract

The Cultivated Area in Kamojang Crater, Ibun District, Bandung Regency is part of a single landscape mountain, adjacent to conservated and protected areas which has high biodiversity. This study aims to identify invasive alien plants species in cultivated areas, adjacent to conservation and protected areas. The method used is a descriptive qualitative study with the sampling line transect in 500 meter radius of four location, namely near Nature Reserves (NR), near Nature Tourism Parks (NTP), agriculture (A) and near Protected Forests (PF), and this study has done up at July until November, 2022. The results showed that in the cultivated area in Kamojang Crater, Ibun District, Bandung Regency found 41 families and 96 species of understorey, with the highest number being from the Asteraceae, Poaceae and Fabaceae. Diversity of understorey was categorized as high (H'=3.428), evenly distributed (E=0.738), high species richness (R=13.503) and no dominant species (C=0.165). Several understorey, namely 8 orders, 10 families, and 29 species were categorized as invasive aliens plant species, with the highest important values index being Ageratina riparia (99,642%), Imperata cylindrica (72,919%), Paspalum notatum (31,155%), Chromolaena odonata (31,074%), Etlingera elatior (27,905%), Ageratum conyzoides (20,179%), Lantana camara (19,029%), Amaranthus hybridus (18,818%), Pennisetum purpureum (15,120%), Mimosa pudica (15,031%), Crassocephalum crepidioides (14,037%), and Axonopus compresus (10,671%).
Pengenalan Budidaya Tanaman Tomat Melalui Metode Hidroponik Di Desa Parentas Kecamatan Cigalontang Kabupaten Tasikmalaya Mubarok, Syariful; Nuraini, Anne; Sudarjat, Sudarjat; Suminar, Erni; Qonit, Muhammad Abdilah Hasan
Jurnal ABDINUS : Jurnal Pengabdian Nusantara Vol 3 No 2 (2020): Volume 3 Nomor 2 Tahun 2020
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/ja.v3i2.13830

Abstract

The development of plant cultivation technology is now developing rapidly. One of the technologies being developed is the technology of cultivating landless or by using a hydroponic system. Many types of hydroponics, one of which is the method of drip irrigation with planting media in the form of husk charcoal. The purpose of this activity is to introduce renewable technology to the cultivation of tomato plants to the community, so that public knowledge will increase. This activity was carried out in Parentas Village, Cigalontang District, Tasikmalaya District, with a survey method and socialization of the introduction of tomato cultivation technology through the Hydroponic system to the public. This program succeeded in informing the villagers about the cultivation techniques of tomato plants using Hydroponic technology with satisfactory results. The response of the extension participants who were enthusiastic and felt interested in the technology encouraged the participants to be willing to cultivate tomato plants with Hydroponic technology and work together to be able to produce tomato products with the technology in a sustainable manner.
An Analysis of the Impact of Famers’ Practices on Pesticide Residue Levels in Chili Pepper Commodities in West Java Rusydan, Muhammad Ardillah; Dono, Danar; Sudarjat, Sudarjat
CROPSAVER Vol 8, No 2 (2025)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v8i2.68685

Abstract

Chili plants are highly susceptible to infestations by various Plant Pest Organisms (OPT) such as fruit flies, thrips, leaf-eating caterpillars, and fruit borers, as well as diseases like anthracnose, root rot, and leaf spot. To manage these threats, most farmers still rely on synthetic chemical pesticides. Improper pesticide application—particularly in terms of dosage and frequency—can lead to pesticide residues on harvested crops and pose risks to both the environment and human health. This study aims to analyze farmers' behavior in pesticide use and to measure pesticide residue levels in chili samples collected from three major production centers in West Java: Arjasari, Lembang, and Garut. A mixed-method approach combining qualitative interviews and quantitative High-Performance Liquid Chromatography (HPLC) analysis was used to evaluate six active pesticide ingredients. The results showed that most farmers applied pesticides beyond the recommended dosage and frequency. Residues of chlorothalonil and broflanilide were detected in the samples, with concentrations exceeding the Maximum Residue Limits (MRLs). These findings highlight the urgent need for education and stricter oversight regarding pesticide application practices among farmers.
Diversity of Bird in Cultivated Area Kamojang Crater, Laksana Tourism Village, Ibun-Bandung Rasiska, Siska; Asdak, Chay; Parikesit, Parikesit; Sudarjat, Sudarjat; Gunawan, Budhi; Setiawan, Iwan
CROPSAVER Vol 8, No 2 (2025)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v8i2.67181

Abstract

The birds have an important role in the cultivated areas Kamojang Crater, Cikaro subwatershed, Laksana Tourism Village, Ibun - Bandung District. The study aims to explore the diversity of birds and classified them in guild groups. The census method was carried out in June-November 2022, with a sample point count technique with a radius of 50 meters and a distance between the center point of at least 200 meters, observed in the morning (06.00-10.00 am) and afternoon (14.00-16.00 pm) at each point for 10 minutes. Located in cultivated areas were near  the nature reserve (NR), nature tourist park (NTP),protected forest (PF), and agricultural land (AL). The results showed that the birds are found 270 individu , 21 species, 7 ordo, dan 18 family. In general, the diversity of bird species in the Kamojang Crater cultivated area tends to be moderate (2,53), with a high abundance (4,09), birds species are equal in each location (0.80) and none dominate (0,11). The birds have higher Important Value Index in NR, NTP is Prinia familiaris (73,16 dan 53,58), in PF Lonchura leucogastroides (47,63), and AL is Apus Affinis (79,87). Birds found in cultivated areas near NR, NTP and AL are dominated by insectivore birds, while in the cultivated area near PF are predominated by granivore birds. According to the Similarity Index, bird communities in cultivated areas near NR have strong similarities with birds communities near NTP (62.5%, 76.92%, 29.71% and 63.06%).
Keefektifan Ekstrak Metanol Daun dan Buah Belimbing Wuluh (Averrhoa bilimbi L.) dalam Menekan Populasi Kutukebul (Bemisia tabaci Genn.) pada Tanaman Tomat Sudarjat, Sudarjat; Asyiva, Shabriena Almeira; Hersanti, Hersanti
Jurnal Agrikultura Vol 36, No 3 (2025): Desember, 2025
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/agrikultura.v36i3.68729

Abstract

Kutukebul (Bemisia tabaci Genn.) merupakan salah satu hama utama pada tanaman tomat. Pengendalian hama ini umumnya masih mengandalkan penggunaan pestisida sintetik. Namun, sebagai upaya pengendalian yang lebih ramah lingkungan, pestisida nabati kini semakin banyak mendapat perhatian. Penelitian ini bertujuan untuk mendapatkan konsentrasi ekstrak metanol daun dan buah belimbing wuluh (Averrhoa bilimbi L.) yang tepat dalam menekan populasi kutukebul pada tanaman tomat. Percobaan ini dilakukan di laboratorium Pestisida dan Toksikologi Lingkungan, dan di rumah kaca Ciparanje Fakultas Pertanian Universitas Padjadjaran sejak bulan Juli hingga September 2024. Penelitian dilaksanakan dengan dua tahap pengujian yaitu uji toksisitas dan uji keefektifan. Penelitian ini menggunakan metode percobaan Rancangan Acak Kelompok yang terdiri atas sembilan perlakuan dan tiga ulangan, yaitu P1 (kontrol), P2 (LC50 daun belimbing wuluh), P3 (LC95 daun belimbing wuluh), P4 (2 × LC95 daun belimbing wuluh), P5 (3 × LC95 daun belimbing wuluh), P6 (LC50 buah belimbing wuluh), P7 (LC95 buah belimbing wuluh), P8 (2 × LC95 buah belimbing wuluh), P9 (3 × LC95 buah belimbing wuluh). Hasil penelitian didapatkan bahwa ekstrak metanol daun dan buah belimbing wuluh pada masing-masing konsentrasi terendah 3,2 g/L dan 3,4 g/L efektif dalam menekan kutukebul pada tanaman tomat dan menghasilkan panen yang lebih tinggi dibandingkan dengan kontrol.
Effectiveness of Tamarind (Tamarindus indica L.) Leaf Water Extract Against Root-Knot Disease (Meloidogyne spp.) on Tomato Plants Sunarto, Toto; Sudarjat, Sudarjat; Irwan, Aep Wawan; Fatonah, Siti
CROPSAVER Vol 8, No 2 (2025)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v8i2.68786

Abstract

Root-knot disease is a major disease that attacks tomato plants. This disease is caused by the Root-knot nematode (Meloidogyne spp.), which can lead to significant losses in tomato crops. Farmers commonly use synthetic nematicides to control these nematodes, but excessive use of chemical agents can have negative effects. Tamarind leaf is a potential alternative that can be used as a botanical nematicide to control the nematodes that cause root-knot disease in tomato plants because it contains various secondary metabolite compounds, such as flavonoids. This research was conducted to determine the effectiveness of various concentrations of tamarind leaf aqueous extract in controlling Meloidogyne spp. nematodes. The experiment was carried out from May to July 2025 in the Plant Nematology Laboratory Division and Greenhouse of the Department of Plant Pests and Diseases, Faculty of Agriculture, Universitas Padjadjaran. The experiment used a Randomized Block Design (RBD) with seven treatments and four replications, consisting of a control, tamarind leaf aqueous extract at 2%, 4%, 6%, 8%, 10%, and carbofuran at 2g/tanamn. The results showed that the application of Tamarindus indica leaf water extract was effective in suppressing root-knot disease (Meloidogyne spp.) in tomato plants. T. indica leaf water extract at a concentration of 6% can suppress the number of galls on tomato plant roots by up to 64.91% and can suppress the number of second juvenile (J2) Meloidogyne spp. in 100 ml of soil by up to 71.18%.
Inventory of Understorey with Potential as Botanical Insecticide in Cultivated Area the Kamojang Crater, Cikaro River Sub-Watershed Rasiska, Siska; Sudarjat, Sudarjat; Parikesit, Parikesit; Asdak, Chay; Gunawan, Budhi
CROPSAVER Vol 9, No 1 (2026)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v9i1.69927

Abstract

Botanical insecticides are one of the alternatives to control vegetable plant insect pests that are considered effective and efficient. However, in its implementation there are obstacles, including information about understorey that have the potential to be botanical insecticides. This study aims to inventory understorey as botanical insecticides in the cultivation area Kamojang Crater of the Cikaro subwatershed. The method used in this study is exploration by sampling transects with a radius of 500 meters. Each path is determined by 5 observation points, so that 20 observation plots are obtained in the cultivation area near nature reserves (NA), nature tourism parks (NTP), protected forests (PF), and agricultural land (AL). The understorey were found then identified, calculated their density, frequency, dominance, important value index, species diversity, type richness, evenness, and dominance. The results showed that 41 families, 93 species, and 3,355 individuals of understorey were found. A number of families and species of plants have the potential to be botanical insecticides such as Asteraceae, Fabaceae, Euphorbiaceae, Malvaceae, Lamiaceae, and Rutaceae, with the species being Ageratina riparia; Imperata cylindrica; Chromolaena odorata; Etlingera elatior; Centela asiatica;  Lantana camara; Mimosa pudica; Pennisetum purpureum;  Ageratum conyzoides;  Cynodon dactylon;  Galinsoga parviflora;  and Althenantera philoxeroides. The diversity of understorey species with the potential as botanical insecticides is categorized  medium (2.404<H'<2.752), with a high species richness index (5.352<E<6.196), and a high evenness index (0.666<R<0.736), as well as a low dominance index (0.117<C<0.183). and the biopesticides species in cultivated areas near NTP have strong type similarities with AL.
Co-Authors Aep Wawan Irwan Agung Triantoro Riyanto Anne Nuraini Apong Sandrawati Argo Utomo Asyiva, Shabriena Almeira Budhi Gunawan Ceppy Nasahi Chay Asdak Danar Dono Dewi Rengganis Elga Sari Endah Yulia Ernah Ernah Erni Suminar Fitri Widiantini Hersanti - Ida Nurhelawati Iwan Setiawan Lindung Tri Puspasari Luciana Djaya, Luciana Masturina, Safirah Amalia Melania Fadillah Meliyansyah, Rika Muhammad, Ardhi Nurazizah, Rahmalia Parikesit Parikesit Qonit, Muhammad Abdilah Hasan Rika Meliansyah Rusydan, Muhammad Ardillah Salbiah Salbiah, Salbiah Septria, Dina Setiawan, Ditriz SIska Rasiska, SIska Siti Fatonah Sri Hartati Syariful Mubarok Tarkus Suganda Tohidin Tohidin, Tohidin Toto Sunarto Utari, Astarina Widayani, Neneng Sri Wiwik Handayani Yani Maharani, Yani Yusup Hidayat Zahra, Maghfira Az Zahra, Zakiah