Jurnal Entomologi Indonesia 2022-12-02T16:03:11+00:00 Prof. Dr. Damayanti Buchori, MSc. Open Journal Systems <p><strong>Jurnal Entomologi Indonesia </strong>(<a href="">P-ISSN: 1829-7722</a>; <a href="">E-ISSN: 2089-0257</a>) is an Indonesian-based scientific journal, published by the Indonesian Entomological Society. JEI is issued every March, July, and November of each year. It publishes original research article, reviews, and short communications covering research results in the field of tropical entomology. JEI was founded in 2004 and is now in its 18th year. The journal is supported by the <a href="">Entomological Society of Indonesia</a> in collaboration with the <a href="">Department of Plant Protection</a>, Faculty of Agriculture, IPB University.</p> <p>JEI is an open-access, peer-reviewed journal that has been Accredited (2022-2026) base on Ministerial Decree of the Minister of Research and Technology/Head of National Research and Innovation Agency of the Republic of Indonesia No. 105/E/KPT/2022</p> <p>JEI has been registered in Crossref, DOAJ, <a href="" target="_blank" rel="noopener">SINTA Rank 2</a>, Google Scholar, Portal Garuda, CiteFactor, and other scientific databases. </p> Toksisitas minyak Azadirachta indica, Ricinus communis, dan campurannya: Pengaruhnya terhadap indeks nutrisi larva dan oviposisi imago Spodoptera frugiperda (J. E. Smith) pada tanaman jagung 2022-03-21T06:41:09+00:00 Retno Wulansari Yusup Hidayat Danar Dono <p><em>Spodoptera frugiperda</em> (J. E. Smith) is an invasive pest that causes a high economic impact on maize. Alternative control that is relatively safe to non-target organisms that can be combined with other control strategies is botanical insecticides. This study aimed to evaluate the effect of <em>Azadirachta indica </em>(Meliaceae), <em>Ricinus communis</em> (Euphorbiaceae) oils, and their mixtures on mortality and nutritional indices and oviposition of <em>S. frugiperda</em>. The testing of toxicity and nutritional indices was done using the feed dipping method, while oviposition testing was conducted by spraying on treated plants. The relationship between concentration and mortality of tested insects was analyzed using probit analysis, while other data using analysis of variance. The results showed that <em>A. indica</em>, <em>R. communis</em>, and their mixtures were toxic to <em>S. frugiperda </em>larvae (II–VI) with LC<sub>50</sub> values ​​of 0.039 (0.017–0.100)%, 0.144 (0.094–0.221)%, 0.034 (0.021–0.061)% respectively, and of LC<sub>95</sub>, 0.391 (0.134–16.671)%, 4.379 (1.986–15.516)%, 0.219 (0.104–1.251)%, respectively. The toxicity of the oil mixture increased 4.2 times to 20.0 times at LC<sub>50</sub> and LC<sub>95</sub>, respectively. Oil treatments resulted in a decrease in the relative consumption rate, relative growth rate, food utilization efficiency, an increase in approximate digestibility of <em>S. frugiperda</em>. In addition, botanical oils act as antioviposition of <em>S. frugiperda</em>. However, <em>A. indica</em>, <em>R. communis</em>, and their mixtures were phytotoxic on maize. Therefore, the opportunity of a mixture of <em>A. indica</em> and <em>R. communis</em> oils to be used as an insecticide still needs to be evaluated or can be used on other plants that are more tolerant.</p> 2022-12-02T00:00:00+00:00 Copyright (c) 2022 Retno Wulansari, Yusup Hidayat, Danar Dono Pengaruh penambahan kitosan pada media tumbuh Beauveria bassiana (Bals.) Vuill terhadap pertumbuhan, perkembangan, dan virulensinya pada walang sangit (Leptocorisa acuta F.) 2021-02-19T10:21:58+00:00 Muhammad Ainul Yaqin Nanang Tri Haryadi <p>Continuous propagation of the fungus <em>Beauveria bassiana </em>on artificial media will cause a decrease in its virulence. The solution offered as an alternative to maintain the virulence of the <em>B. bassiana</em> fungus is the addition of chitosan to the growing medium with the right concentration. This study aims to determine the effect of the addition of chitosan at several concentrations on growth, development and virulence of <em>B. bassiana</em>. This research was designed using a completely randomized design with 6 treatments and 4 replications. The treatments used are P0 (control), P1 (chitosan 1 mg/ml), P2 (chitosan 2 mg/ml), P3 (chitosan 3 mg/ml), P4 (chitosan 4 mg/ml), and P5 (chitosan 5 mg/ml). The results showed that chitosan affected the growth and development of <em>B. bassiana</em> fungi, as seen in parameters of colony diameter and conidia viability. The highest colony diameter occurred in the P1 treatment that was 8.34 cm and the highest conidia viability also occurred in the P1 treatment which was 85.26%. The effect of chitosan on<em> B. bassiana</em> virulence can be seen in the parameters of mortality, mycosis, and mummification. The addition of a chitosan concentration of 1 mg/ml in the fungal growth medium has a good effect on the growth and virulence of <em>B. bassiana.</em></p> 2022-12-02T00:00:00+00:00 Copyright (c) 2022 Jurnal Entomologi Indonesia Struktur umur dan kelimpahan kumbang badak dan kumbang tanduk (Coleoptera: Scarabaeidae) pada perkebunan kelapa sawit di PTPN VIII Unit Parakan Salak, Kabupaten Sukabumi 2022-09-09T04:55:36+00:00 Hery Widyanto Pudjianto Pudjianto I Wayan Winasa <p>The coconut rhinoceros beetle (Oryctes rhinoceros L.) and brown rhinoceros beetle (Xylotrupes gideon L.) (Coleoptera: Scarabaeidae) are insect pests commonly found in oil palm plantations. Availability of breeding sites is one of factors that can increase the beetle population. Therefore, this study aimed to determine the abundance and age structure of the coconut rhinoceros beetles and brown rhinoceros beetles in the breeding sites located in a plantation with immature and mature stage of oil palms. The results of this study indicated that the abundance of coconut rhinoceros beetle was found to be lower than brown rhinoceros beetle (4.47±13.56 compared to 25.23±16.48 individuals/plot) in the oil palm plantations in PTPN VIII Parakan Salak, Sukabumi Regency. The population of coconut rhinoceros beetle was found in the breeding site located in the plantation with mature oil palms, but not found in the location with immature plants. The age structure of coconut rhinoceros beetle was dominated by the 1st and 2nd instar larvae. The age structures of brown rhinoceros beetles in the breeding sites located in the immature and mature oil palm were similar, and they were dominated by the 1st, 2nd, and 3rd instar larvae. Results of correlation analysis show that there is no correlation between soil chemical characteristics of the breeding site and the beetle population. Soil chemical characteristics at the breeding sites in both locations were relatively similar, and consequently, the abundance and age structure of coconut rhinoceros beetle and brown rhinoceros beetle not significantly different between both locations.</p> 2022-12-03T00:00:00+00:00 Copyright (c) 2022 Hery Widyanto, Pudjianto Pudjianto, I Wayan Winasa