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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology Cropsaver : Journal of Plant Protection Jurnal Perlindungan Tanaman Indonesia Rona Teknik Pertanian
Arifin Tasrif
Bogor Agricultural Development Polytechnic, Jln. Surya Arialaga No. 1, Cibalagung, Bogor, West Java 16119 Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Engineering Immunology & microbiology Veterinary

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 1 
Role of Cocoa Clones and Endophyte Fungi in controlling VSD Disease in the Field Muhammad Taufik; Asniah Asniah; Muhammad Botek; Rahayu M; Arifin Tasrif
CROPSAVER Vol 4, No 1 (2021)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v4i1.33087

Abstract

The fungus Ceratobasidium theobromae is the cause of vascular streak dieback (VSD) in cocoa. VSD disease can cause death in susceptible clones by more than 59%. The use of resistant cocoa clones and endophytic fungi can be an alternative for VSD disease control. The research objective was to evaluate cocoa clones and endophytic fungi to control VSD in the field. The experimental design used was a randomized block design with a factorial pattern. The first factor was cocoa clones, which consisted of clones 45 (K1) and 25 (K2), and the second factor was several types of endophytic fungi. The results showed an interaction between cacao clones and endophytic fungi isolates on the height and number of cocoa leaves. The two cacao clones tested could be naturally infected by C. theobromae without endophytic fungi, with disease incidence of VSD 5, 21% in K1, and 5.75% in K2. The two cocoa clones treated with endophytic fungi, i.e., Paecilomyces sp. EP1, Paecilomyces sp. EP2 and Paecilomyces sp. EP1 + Trichoderma sp.)  did not show symptoms of VSD until 20 weeks after planting.
New Paradigm on Plant Quarantine System for Protection of Biological Diversity in Indonesia Arifin Tasrif; Muhammad Taufik; Nazaruddin Nazaruddin
Jurnal Perlindungan Tanaman Indonesia Vol 25, No 1 (2021)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jpti.62605

Abstract

Plant quarantine system becomes an important pillar in the protection of biological diversities from the threat of plant pests and diseases. The implementation of plant quarantine system currently covers prevention of spread of quarantine pests, food safety, food quality, genetic resources and bio-agents, as well as invasive alien species and genetically modified organism. During 2014 to 2018, a total of 232 frequency intercepted of quarantine pests of viruses, bacteria, fungi, nematodes, insects, and weeds have been detected. These pests associated with plant materials from various countries in Asia, Europe, the United States, Australia and Africa that may potentially threaten biological diversities when dispersed within Indonesian territory. Implementation of risk analysis and appropriate level of protection consideration can be clustered in to pre-border, at-border, and post-border activities in order to mitigate the risk of quarantine pests and biosafety monitoring into Indonesian territory. Utilizing advances in pest detection technology in the industrial era 4.0 could provide benefits in the agricultural sectors. Various detection technologies using drones and bio-sensors have contributed in the field of plant protection, especially as pest detection and monitoring tools in the field. Furthermore, the establishment of proficiency certification agency for plant quarantine systems may contribute efficient and effective operations in the near future.
PHYTOTOXICITY AND FIELD EFFICACY OF EXSEROHILUM LONGIROSTRA JC/MIN THE CONTROL OF BARNYARDGRASS ECOTYPES (ECHINOCHLOA CRUS-GALLI VAR. CRUS-GALLI(L.) BEAUV) ABDUL SHUKOR JURAIMI; ARIFIN TASRIF; JUGAH KADIR; SUHAIMI NAPIS; SOETIKNO SLAMET SASTROUTOMO
BIOTROPIA - The Southeast Asian Journal of Tropical Biology No. 24 (2005)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (368.348 KB) | DOI: 10.11598/btb.2005.0.24.172

Abstract

Five selected ecotypes of bamyardgrass (Echinochloa crus-galli var. crus-gatti) from several rice growing areas in Malaysia and Indonesia were tested for their susceptibility  to the potential bioherbicide  (Exserohilum longirostratum). Bamyardgrass seedlings at the 2-3-lcaf stage were treated with 2.5xl07 conidia/ml from E. longirostratum  at different application frequencies (single, double and triple). In addition, aqueous extract assays were evaluated for the presence of a phytotoxic compound responsible for the virulence of the bioherbicide. Results of the study showed that disease severity significantly increased 20 days after treatment and resulted in mortality of the seedlings. Ecotypes from Perak and Lampung were most susceptible to the bioherbicide upon triple applications. Percentage dry weight reductions were 86.34 and 83.14%, respectively. Other ecotypes (Melaka, Banten and South Sulawesi) were observed to have a relatively similar response. Moreover, aqueous extracts of E. longirostratum  increased mortality up to 92.50% of bamyardgrass seedlings. These findings suggest that regular (double and triple) applications of E. longirostratum at a concentration of 2.5xl07 conidia/ml significantly increased mortality among bamyardgrass ecotypes. Mortality of the seedlings was attributed to the presence of a secondary phytotoxic metabolite. Key words :    Field efficacy / Phytotoxicity / Exserohilum longirostratum I Echinochloa crus-galli var. crusgalli I ecotypes.
MORPHOLOGICAL VARIATION OF THE ECOTYPES OF Echinochloa crus-galli var crus-galli (L). Beauv (Barnyard grass: Poaceae) IN MALAYSIA and INDONESIA SOET1KNO S SASTROUTOMO; ABDUL SHUKOR JURAIMI; JUGAH KADIR; SUHAIMI NAPIS; ARIFIN TASRIF
BIOTROPIA - The Southeast Asian Journal of Tropical Biology No. 22 (2004)
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (667.039 KB) | DOI: 10.11598/btb.2004.0.22.206

Abstract

Greenhouse experiments were conducted to examine the morphological traits of barnyard grass ecotypes from diverse geographic origin. Seeds (caryopsis) were collected from 17 locations of  rice fields throughout Malaysia (11 states) and Indonesia (six provinces) and were grown in pots each  containing 10 kg of paddy field soil. The experiments were arranged using completely randomized design (CRD) with five  replicates. Mean separation was calculated using Duncan multiple range test at 5% probability level. Unweighted pair-group method of arithmetic averages (UPGMA) was performed to determine the individual relationship within ecotypes of barnyard grass. Twelve morphological traits such as culm, panicle, leaf, and spikelet traits were measured. The growth characters such as emergence date, heading time, and growth duration were also evaluated. The average of emergence date, heading time, and growth duration of barnyard grass collected from Perils, Kedah, Penang, and Johor were relatively earlier than other ecotypes. Six groups were classified based on the cluster analysis of Malaysian ecotypes of barnyard grass. Principal component  indicated that group six was found to be highly variable compared to others. While three groups were identified in Indonesian ecotypes of barnyard grass. Group one was observed to be highly variable. Results demonstrated that morphological variation among  ecotypes of barnyard grass showing differences between the two regions illustrate the role of geographic variation. Key words : Variation / ecotypes / paddy field weeds / barnyard grass.
Studi Penggunaan Plat Elektroda Netral Stainless Steel 316 dan Aluminium Terhadap Performa Generator HHO Dry Cell Tasrif Arifin; Bayu Rudiyanto; Yuana Susmiati
Rona Teknik Pertanian Vol 8, No 2 (2015): Volume 8, No. 2, Oktober 2015
Publisher : Department of Agricultural Engineering, Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17969/rtp.v8i2.3009

Abstract

Abstrak. Generator HHO merupakan alat yang menggunakan prinsip elektrolisis air untuk memisahkan unsur-unsur kandungan air murni (H2O) menjadi Gas HHO, dalam upaya peningkatan performanya tentu dibutuhkan bahan konduktor yang memiliki sifat kelistrikan baik. Penambahan plat elektroda netral ialah bertujuan untuk meningkatkan performa elektroliser dan mengatasi berbagai macam permasalahan yang terjadi pada saat proses elektrolisis air bekerja. Penelitian ini menunjukkan bahwa plat elektroda netral aluminium mampu meningkatkan nilai performanya sedangkan untuk plat SS 316 mampu meminamalisir persentase losses energy. Larutan AMDK murni terbukti mampu meningkatkan produktivitas gas dibandingkan dengan larutan aquades murni, tetapi kelemahan dari larutan AMDK yaitu mudahnya terbentuk gel-gel, sehingga menghambat pergerakan elektron dan laju aliran produksi. Karateristik sifat bahan sangat berpengaruh terhadap pencapaian kinerja Generator HHO karena tidak semua jenis plat elektroda netral mampu meningkatkan performanya. Sifat-sifat kelistrikkan bahan yang sangat berpengaruh ialah sifat keelektronegatifan atau potesial elektroda dan koefisien nilai muai dari suatu bahan konduktor. Usage Study Neutral Electrode Plate Stainless Steel 316 and Aluminium of Performance Generator HHO Dry Cell TypeAbstract. Generator is a tool that use principle of water electrolysis to separated the element of pure water conscience (H2O) be HHO gas, in effort to increase the perform of HHO Generator is needed a conductor ingredients which has a good electricity character the direction of addition neutral electrode plate is to increase the electrolyzer perform and to overcome every problem that happen when the water electrolisys process is going. This research shows that neutral electrode aluminium plate can increase the performance value and the SS 316 plate can minimize the percentage of losses energy. The pure AMDK solution proofs that can increase the gas productivity than the pure aquadest solution, but the weakness of AMDK solution can to form gel easily, which cause the electrons movement and the flowrate production are blocked. The characteristic of water usage is influence to HHO Generator work maximum value, because for every type of netral electrode plate can’t increase the performance of generator. The electricity characteristic of material that every influence is the electronegatifity character or electrode potential and the expansion coefficient from the conductor materials.
Co-Authors ABDUL SHUKOR JURAIMI ABDUL SHUKOR JURAIMI Asniah Asniah Bayu Rudiyanto JUGAH KADIR JUGAH KADIR Muhammad Botek Muhammad Taufik Muhammad Taufik Nazaruddin Nazaruddin Rahayu M SOET1KNO S SASTROUTOMO SOETIKNO SLAMET SASTROUTOMO SUHAIMI NAPIS SUHAIMI NAPIS Yuana Susmiati