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Biological Control of Bacterial Grain Rot Disease Caused by Burkholderia glumae Using Actinomycetes Nurmujahidin; Giyanto, Giyanto; Dadang
Jurnal Fitopatologi Indonesia Vol 19 No 2 (2023): Maret 2023
Publisher : The Indonesian Phytopathological Society (Perhimpunan Fitopatologi Indonesia)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14692/jfi.19.2.63-73

Abstract

Biological Control of Bacterial Grain Rot Disease Caused by Burkholderia glumae Using ActinomycetesBacterial grain rot disease is an important disease in rice plants caused by the bacterium Burkholderia glumae and causes yield loss up to 70%. In general, it is recommended to control this disease by seed treatment using various biological agents, including actinomycetes which produce antibacterial bioactive compounds. The aim of this study was to obtain actinomycetes strains that have the potential to control bacterial grain rot caused by B. glumae. The stages of the research included isolating and screening actinomycetes as potential biological agents against B. glumae, testing the phytotoxicity of actinomycetes on rice seeds, and testing the effectiveness of actinomycetes in controlling B. glumae on rice in the nursery phase. There were 40 actinomycetes isolated from rice plants and the rhizosphere and 17 of them had no potential as pathogens for plants or mammals. The suppression potency of the actinomycetes based on antibiosis test yielded 7 actinomycetes strains that were able to suppress the development of B. glumae and 5 strains had an inhibition zone of more than 2 mm, were not phytotoxic to rice plants and had the ability to promote plant growth. This actinomycete strain affects the growth of B. glumae and also suppresses the degree of its infection. Actinomycetes ST1, ST27, and BT23 strains were effective in suppressing bacterial grain rot in the nursery phase.
Application of Input Management and Integrated Pest Management on Paddy Production: Case Study in Kampar Subdistrict, Kampar District, Riau Province Amalia; Syaukat, Yusman; Hakim, Dedi Budiman; Dadang
Jurnal Manajemen & Agribisnis Vol. 20 No. 2 (2023): JMA Vol. 20 No. 2, July 2023
Publisher : School of Business, Bogor Agricultural University (SB-IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17358/jma.20.2.245

Abstract

The attack levels of plant pest organisms (PPO) highly influence the productivity of paddy rice farming. With the increasing human awareness of the dangers of using pesticides, especially for the environment and human health, PPO control prioritizes preventive control by applying the principles of integrative pest management (IPM), which prioritizes the application of healthy crop cultivation, routine observation, utilization of natural enemies and farmers as IPM experts. The use of inputs by farmers in production activities can affect the resulting production. This study aimed to estimate the effect of input management, IPM, and non-IPM on paddy rice production. The analysis used in this study was the Cobb-Douglas production function with the multiple linear regression method. Partially, each variable of land area, seeds, inorganic fertilizers, and dummy variables of IPM or non-IPM farmers significantly affected paddy rice production in Kampar Subdistrict. Variables of organic fertilizers, natural pesticides interacted with frequency, chemical pesticides interacted with frequency, and labor partially had no significant effect on lowland paddy rice production in Kampar Subdistrict. It is necessary to re-enact counseling on IPM in Kampar Subdistrict, Kampar District, to apply IPM principles that prioritize preventive PPO control to avoid the dangers of using pesticides for the environment and human welfare. Keywords: Cobb-Douglas, plant pest organisms, integrative pest management, non-IPM, rice paddy production
Instalasi dan Verifikasi Quality Test Module (QTM) Cerulean untuk Mengurangi Data error pada Produk Sigaret Kretek Mesin (SKM) dan Sigaret Putih Mesin (SPM) Dadang; Juwari; Wijaya, Santoso; Erwinda, Mirza
Prosiding Sains dan Teknologi Vol. 3 No. 1 (2024): Seminar Nasional Sains dan Teknologi (SAINTEK) ke 3 - Januari 2024
Publisher : DPPM Universitas Pelita Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Quality Test Module (QTM) merupakan instrumen penting dalam mengukur data fisik produk sigaret. Data fisik melibatkan beberapa parameter, seperti ventilasi dan pressure drop. Namun, penggunaan QTM selama lebih dari lima tahun menunjukkan penurunan akurasi dan presisi. Data error yang tercatat mencapai 1,62%, dengan variasi ventilasi sebesar 6% dan pressure drop sebesar 48,6 mmWg. Hal ini membawa risiko terhadap validitas data fisik dan kimia, termasuk Total Aerosol Residue (TAR) dan kandungan nikotin. Sebagai upaya penanggulangan, dilakukan pembaruan sistem yang komprehensif, melibatkan pelatihan bagi operator QTM, pembaharuan unit, kalibrasi berkala, dan pemeliharaan rutin selama periode observasi tiga bulan. Hasilnya menunjukkan peningkatan signifikan dengan mengurangi data error menjadi 0,63%, menstabilkan variasi ventilasi sebesar 4,2%, dan menjaga pressure drop yang terkendali dengan variasi sebesar 35,6 mmWg. Peningkatan sistematis ini berhasil mengembalikan tingkat presisi dan akurasi pengukuran data fisik produk sigaret serta memberikan kontribusi positif terhadap keandalan data yang dihasilkan. Perbaikan ini diharapkan dapat meningkatkan akurasi dan presisi pengukuran QTM secara keseluruhan, sekaligus membantu dalam verifikasi akurasi kandungan kimia pada sigaret sesuai dengan standar SNI 01-0765 Tahun 1999 tentang Sigaret Putih dan SNI 0766 Tahun 2015 tentang Sigaret Kretek.
The Toxicity Test of Synthetic Insecticides on Tetragonula laeviceps (Apidae: Meliponini) Hasanah, Ina Rubiatul; Mubin, Nadzirum; Sartiami, Dewi; Priawandiputra, Windra; Dadang
HAYATI Journal of Biosciences Vol. 31 No. 2 (2024): March 2024
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.4308/hjb.31.2.271-283

Abstract

Intense insecticide application is thought to cause a decline in bee colonies worldwide. Bees are effective pollinators in increasing the production of agricultural commodities. The stingless bee Tetragonula laeviceps (Apidae: Meliponini) is widely cultivated and found around plantations. The insecticides used in the toxicity test were imidacloprid 200 g/L, fipronil 50 g/L, lambda-cyhalothrin 25 g/L, profenofos 500 g/L, and chlorantraniliprole 50 g/L followed by a semi-field test using imidacloprid, fipronil, and profenofos insecticides on the cucumber plant. The LC50 value showed that exposure to imidacloprid, fipronil, and profenofos insecticides caused toxic effects on T. laeviceps by contact and orally. Lambda-cyhalothrin was found harmful on contact exposure, in contrast, chlorantraniliprole was harmful through oral. Classification of insecticide toxicity based on LD50 contact for imidacloprid, fipronil, lambda-cyhalothrin, and profenofos were very toxic and needed a risk assessment. However, chlorantraniliprole was classified as moderately toxic and low risk. In semi-field test results, imidacloprid and fipronil insecticides caused a significant decrease in the leave-return and bee-visiting activity on cucumber flowers. These insecticides also produced a low average yield of fruit weight. Insecticide application can affect the role of T. laeviceps as the pollinator which impacts the production of agricultural commodities.
Keefektifan ekstrak daun sirsak, biji bengkuang, dan buah cabai jawa terhadap ulat grayak jagung (Spodoptera frugiperda (Smith)) (Lepidoptera: Noctuidae): Effectiveness of soursop leaves, yam bean seeds, and Javanese long pepper fruits extracts against larvae of fall armyworm (Spodoptera frugiperda (Smith)) (Lepidoptera: Noctuidae) Agustini, Melia; Sartiami, Dewi; Dadang
Jurnal Entomologi Indonesia Vol 21 No 3 (2024): November
Publisher : Perhimpunan Entomologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5994/jei.21.3.224

Abstract

Fall armyworm (FAW), Spodoptera frugiperda (Smith) is an important pest on maize. Common control carried out by farmers in controlling the pest is by using synthetic insecticides. However, the improper use of synthetic insecticides can cause negative impacts. One strategy to control pests that is safe and environmentally friendly is by using botanical insecticides. Soursop (Annona muricata) leaves, yam bean (Pachyrizus erosus) seeds, and Javanese long pepper (Piper retrofractum) extracts are known to be able to control various insect pests. The aim of this research was to study the effectiveness of soursop leaves, yam bean seeds, and Javanese long pepper extracts on mortality of second instar larvae of FAW. Two test methods used to assess the three extracts on the mortality of S. frugiperda larvae were the leaf residual and the topical application methods. Insect mortality levels were processed using probit analysis to obtain lethal concentration (LC) and lethal dose (LD) values for each extract. The results showed that P. retrofractum extracts showed highest mortality effect on S. frugiperda than P. erosus and A. muricata extracts both on leaf residual and topical application methods. The LC50 and LC95 values of P. retrofractum extract were 0.142% and 0.595%, respectively. Meanwhile the LD50 and LD95 of P. retrofractum extract 0.10 µg/larvae and 0.40 µg/larva, respectively.
ANALISIS HUKUM MENGENAI EFEKTIVITAS SURAT KUASA LISAN DALAM PRAKTIK HUKUM ADVOKAT: Efektifitas Surat Kuasa Lisan Dadang; Dzikur, Muhammad; Muchtar, Andhyka
Jurnal Pilar Keadilan Vol. 4 No. 2 (2025): Pilar Keadilan
Publisher : Program Magister Ilmu Hukum, STIH Painan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Penelitian ini bertujuan untuk melakukan analisis hukum terkait efektivitas surat kuasa lisan dalam praktik hukum advokat. Surat kuasa lisan, sebagai instrumen hukum umum dalam perwakilan klien, menghadapi sejumlah tantangan yang dapat memengaruhi penggunaannya. Pertanyaan mendasar seputar keberlakuan, kekuatan hukum, dan implementasi surat kuasa lisan dalam pengadilan menjadi fokus utama penelitian ini. Tantangan terkait efektivitas surat kuasa lisan melibatkan keraguan atas legitimasi dan penerimaan dokumen tersebut di berbagai yurisdiksi, kebutuhan akan kerangka hukum yang kuat, serta implementasi yang efektif di pengadilan. Analisis mendalam terhadap kendala dan tantangan ini memberikan wawasan yang mendalam terkait potensi hambatan dan solusi untuk meningkatkan efektivitas penggunaan surat kuasa lisan dalam praktik hukum advokat.
Aktivitas insektisida ekstrak Piper aduncum dan Aglaia odorata terhadap Plutella xylostella (Linnaeus) (Lepidoptera: Plutellidae): Insecticidal activity of Piper aduncum and Aglaia odorata extracts on Plutella xylostella (Linnaeus) (Lepidoptera: Plutellidae) heviyanti, Maria; Dadang; Sartiami, Dewi; Kusumah, Yayi Munara; Purwantiningsih
Jurnal Entomologi Indonesia Vol 22 No 1 (2025): March
Publisher : Perhimpunan Entomologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5994/jei.22.1.52

Abstract

One of the main problems in the cultivation of Brassicaceae vegetable plants is the attack of diamondback moth Plutella xylostella (Linnaeus). Extracts of Piper aduncum and Aglaia odorata have the potential to be used as botanical insecticides because they contain compounds that are toxic to insects. This study aims to evaluate the toxicity and feeding inhibition activity of hexane-extract of P. aduncum fruits and methanol-extract of A. odorata twigs against second instar larvae of diamondback moth. Extraction was carried out using the maceration method with a powder-to-solvent ratio of 1:10 (w/v). The diamondback moth insects used were from colonies reared in the laboratory. The lethal effect test was conducted using the leaf-dip method with test concentrations equivalent to LC15, LC35, LC55, LC75, LC95, and a control. The feeding inhibition test was conducted using the choice-test method with test concentrations equivalent to LC15, LC35, LC55, and a control. The results show that the hexane-extract of P. aduncum fruit is more toxic to second instar P. xylostella larvae than the methanol-extract of A. odorata twigs based on the probit analysis value of the relationship between concentration and mortality. The LC50 and LC95 values of P. aduncum extract were 0.07% and 0.14%, respectively, while the LC50 and LC95 values of A. odorata extract were 1.63% and 4.72%. Additionally, P. aduncum and A. odorata extracts also exhibited feeding against diamondback moth at concentrations of 0.07% and 1.77%, respectively. The combined effects of direct toxicity and feeding inhibition contributed to the mortality of the test insects. Thus, these two extracts, escpecially P. aduncum extract wich demonstrated higher effectiveness, have a great potential as botanical insecticides for controlling diamondback moth in Indonesia.
Implementation of Legal Protection for Victims of Revenge Porn Crimes Based on Law Number 31 of 2014 Concerning Protection of Witnesses and Victims from a Victimology Perspective Dadang; Yusdiansyah, Efik; Darusman, Yoyon
Sinergi International Journal of Law Vol. 3 No. 3 (2025): August 2025
Publisher : Yayasan Sinergi Kawula Muda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61194/law.v3i3.796

Abstract

This research is presented as a response to the rampant phenomenon of revenge porn, a cruel act that takes away privacy and causes deep trauma for its victims. This research seeks to examine more deeply about how the implementation of legal protection for individuals who are victims of revenge porn in Indonesia, especially within the framework of Law Number 31 of 2014 concerning Protection of Witnesses and Victims. Through the lens of victimology, this dissertation not only sees victims as passive objects in the justice system, but as individuals who have the right to comprehensive recovery and protection. This research explores further how legal protection for witnesses and victims can truly be felt by survivors of revenge porn, considering the unique characteristics of this crime that often leave deep psychological wounds and severe social stigma. To understand the reality of implementation in the field, this research uses empirical legal methods. This approach involves an in-depth analysis of relevant laws and regulations, combined with direct data collection from various related parties. In-depth interviews with victims of revenge porn, law enforcement officers, victim service institutions, and experts in the fields of law and psychology provide a window to understanding the challenges, obstacles and hopes in realizing effective legal protection for victims. The results of this study are expected to provide a complete picture of the extent to which Law Number 31 of 2014 has answered the protection needs of revenge porn victims. Moreover, this dissertation aims to identify gaps in implementation and formulate constructive recommendations. It is hoped that the findings of this study can contribute to collective efforts to create a legal system that is more empathetic and responsive to the suffering of revenge porn victims, as well as encourage the realization of true justice and recovery for them.
IMPLEMENTATION OF CANVA-BASED MIND MAPPING TO IMPROVE STUDENTS' CREATIVITY ON INDEPENDENCE MATERIAL IN THE 1945-1950 PERIOD: Classroom Action Research in Class IX MTs. Ma'arif Peundeuy Garut Dadang; Tetep; Dianah, Lili
SAHUR Journal Vol. 4 No. 1 (2025): Volume 4 Nomor 1 Tahun 2025
Publisher : Institut Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31980/sahur.v4i1.2715

Abstract

The low level of student creativity in history learning, particularly regarding the topic of Indonesian independence during the 1945–1950 period, served as the background for this research. This is indicated by the lack of originality, flexibility, and elaboration skills in thinking and expressing ideas. The aim of this study is to describe the implementation of Canva-based Mind Mapping as a learning model, analyze the improvement in students' creativity, and identify obstacles and solutions in applying this method. This research employed a Classroom Action Research (CAR) approach with two cycles conducted in Class IX of MTs. Ma’arif Peundeuy Garut. The instruments used included observation, interviews, documentation, and tests. The results showed that the application of Canva-based Mind Mapping significantly improved students' creativity, as evidenced by their enhanced ability to express ideas, create engaging visualizations, and convey information systematically. These findings indicate that the use of digital media such as Canva can be an innovative and effective alternative for fostering student creativity.
STRATEGI PENCEGAHAN KRIMINALISASI GURU PADA SEKOLAH MENENGAH ATAS DI KOTA BANDUNG MELLUI PENDIDIKAN KEWARGANEGARAAN Mukhlisin; Dadang; Muthaqin, Dwi
Pro Patria: Jurnal Pendidikan, Kewarganegaraan, Hukum, Sosial, dan Politik Vol. 8 No. 2 (2025): Pro Patria: Jurnal Pendidikan, Kewarganegaraan, Hukum, Sosial dan Politik
Publisher : Pendidikan Pancasila dan Kewarganegaraan, FKIP, Universitas Banten Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47080/shm7ce52

Abstract

This study focuses on the phenomenon of teacher criminalization by students in Indonesia, particularly within the educational context of Bandung City. This issue has become a serious concern as it can disrupt the teaching and learning process and undermine the authority of educators. Civic Education (PKn) is considered to play a strategic role in preventing the criminalization of teachers in senior high schools. This research employs a qualitative approach using a phenomenological method to explore in-depth understandings of the experiences and perspectives of both teachers and students. Data collection techniques include in-depth interviews, participatory observation, and document analysis. The findings indicate that Civic Education serves as an effective medium to introduce students to the issue of teacher criminalization through the integration of relevant content into the curriculum and the use of varied, participatory, and contextual learning methods. Furthermore, the implementation of a hidden curriculum strategy in Civic Education contributes to character development, enhances critical awareness, and promotes students’ social responsibility toward teachers. Thus, Civic Education proves to be an essential instrument in reducing the potential for teacher criminalization and fostering a healthy, ethical, and respectful educational environment within schools.
Co-Authors Abu Naim Agustini, Melia Alfina Dellachristi, Veronica Amalia Amalia Aminuyati Andhyka Muchtar, Andhyka Darusman, Yoyon Dedi Budiman Hakim DEWI SARTIAMI Dianah, Lili Dindin Aminudin Dzikur, Muhammad Efik Yusdiansyah Erwinda, Mirza FACHMI AL FAROQI Harlina Kusuma Tuti Hasanah, Ina Rubiatul Helmas Septiyo Hadi Heviyanti, Maria Idham Sakti Harahap Ingkak Chintya Wangsih Jumhur Karep Kusumah, Yayi Munara Mubin, Nadzirum Mukhlisin Muthaqin, Dwi Nurmujahidin Purwantiningsih Sena Atmaja Siti Maesaroh Sri Ratna, Endang Syarip Tetep Wijaya, Santoso WINDRA PRIAWANDIPUTRA, WINDRA Yuniati, Dina Yusman Syaukat