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All Journal JURNAL AGROTEKNOLOGI Jurnal Solum Jurnal AGROSAINS dan TEKNOLOGI Majalah Ilmiah Biologi BIOSFERA: A Scientific Journal Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Jurnal Pertanian Agros Journal of Tropical Crop Science JURNAL AGROHITA Jerami Jurnal Entomologi Indonesia Jurnal Agronomi Tanaman Tropika (JUATIKA) Menara Ilmu Akta Agrosia Jurnal Sains Agro Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Jurnal Riset Perkebunan (JRP) Journal of Applied Agricultural Science and Technology Nabatia Jurnal Katalisator Jagur: Jurnal Agroteknologi Indonesian Journal of Forestry Research Biodiversitas Journal of Biological Diversity
Nalwida Rozen
Andalas University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Industrial & Manufacturing Engineering Medicine & Pharmacology Social Sciences Other

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Predatory behavior and predation efficiency of Sycanus sp. against Metisa plana Walker: Implications for biological control in oil palm Zahlul Ikhsan; Mona Aisyah; Nalwida Rozen; Sri Heriza; Moustafa Sabry Bakry; Amsar Maulana; Nur Ain Izzati Mohd Zainudin
Jurnal Entomologi Indonesia Vol 23 No 2 (2026): July
Publisher : Perhimpunan Entomologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5994/jei.23.2.1

Abstract

Bagworm (Metisa plana Walker) is a major defoliating pest of oil palm, causing significant yield losses during outbreaks. Biological control using predatory insects offers an environmentally sustainable alternative to chemical insecticides. This study evaluated the predatory performance of Sycanus sp. against M. plana larvae and assessed the effect of predator density on prey suppression under laboratory conditions. A completely randomized design was used with five predator-density treatments (1, 2, 3, 4, and 5 predators per 10 larvae) and ten replications. Predator performance was evaluated based on prey-search duration, handling time, larval mortality, and prey consumption. The initial prey-search duration ranged from 2.11 to 2.25 min, while subsequent searches ranged from 1.69 to 2.04 min. Prey-handling time remained relatively constant across treatments (58.1–59.1 min). Predation by Sycanus sp. substantially reduced M. plana populations within three days, with the highest mortality occurring on the first day after predator introduction. Predator density significantly increased prey consumption, which rose from 1.26 ± 0.21 larvae at one predator to 4.43 ± 0.19 larvae at five predators. A strong positive relationship was observed between predator density and prey consumption (y = 0.795x + 0.451; R² = 0.9531). Although the highest prey suppression occurred at the greatest predator density, a ratio of two Sycanus sp. adults per ten M. plana larvae provided a favorable balance between prey suppression and predator deployment efficiency. These findings support the potential use of Sycanus sp. as a biological control agent in sustainable oil palm integrated pest management programs.
Utilizationof Rice Husk-derived Microsilica as a Reinforcing Agent in MOCAF Starch-based Bioplastics: Enhancing Mechanical Strength, Barrier Properties and Thermal Stability Ruri Wijayanti; Emriadi Emriadi; Anwar Kasim; Nalwida Rozen
Journal of Applied Agricultural Science and Technology Vol. 10 No. 3 (2026): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v10i3.581

Abstract

Starch-based bioplastics are increasingly recognized as eco-friendly substitutes for conventional synthetic plastics owing to their renewable origins and biodegradability. However, their poor mechanical properties and high affinity for water limit their practical applications. In this study, microsilica derived from rice husks was incorporated as a reinforcing agent to enhance the performance of bioplastics based on a modified cassava flour (MOCAF) starch matrix. This study aimed to determine the characteristics of bioplastics with a MOCAF starch matrix and microsilica added at various concentrations. Bioplastics were prepared with the solution casting method involving starch extraction, gelatinization, addition of microsilica at varying concentrations (0%, 1%, 2%, 3%, 4% and 5%), incorporation of a plasticizer (glycerol) and subsequent molding. The results demonstrated that microsilica addition significantly affected the physicochemical properties of the bioplastics. Tensile strength increased with microsilica content, reaching a maximum of 3.73 MPa at 5 wt%, followed by decreases at higher concentrations. Conversely, elongation at break decreased with increasing microsilica content, indicating reduced flexibility. Water absorption also decreased, indicating increased water resistance in the bioplastics. Fourier Transform Infrared (FTIR) analysis confirmed the interaction between microsilica and the starch matrix, while thermogravimetric analysis (TGA) revealed increased thermal stability after the addition of microsilica. Overall, the incorporation of microsilica effectively improved the mechanical, thermal and barrier properties of the MOCAF-based bioplastics, highlighting their potential for developing more durable and environmentally friendly materials.
Co-Authors Ade Noferta, Ade Afrima Sari Agustian Agustian Aisman Aisman Amsar Maulana Anwar Kasim Anwar Kasim Anwar Kasim Aries Kusumawati Aswaldi Anwar Aulia, Tisya Auzar Syarif Chairil Ezward, Chairil Chaniago, Noverina Dendy Tri Dharma Putra Dewi Hayati Ekasari Putri, Nurwanita ekawati, fitri elza dwi pertiwi Emriadi Emriadi - Endang Murwantini Etti Swasti Ezward, Chairil Ezward Ghea Karilla Ulya Gusnidar, G Gusril, Afdhi Hakim, Nurhajati Hanafi, Fakhri Hasri Gusman Hervani, Dini Indra Dwipa Ira Ira Irawati Chaniago Irfan Suliansyah KHAIRANI, MIFTAHUL Khodratien Fatonah Maulidya Fachra Nisa Yusri Mona Aisyah Moustafa Sabry Bakry Musliar Kasim Nisa Azzahra Gusviani Noprizal Noprizal NOVERINA CHANIAGO Noverina Chaniago Noverina Chaniago Novizar Nazir Nur Ain Izzati Mohd Zainudin Nurhajati Hakim P.K. DEWI HAYATI Purnama Sari, Indah Ramadhani, Hanadiya Roza Yunita Ruri Wijayanti Ruri Wijayanti Ryan Budi Setiawan Sari, Afrima SASANTI WIDIARSIH SISKA WITARI Siska Efendi Sri Heriza SUTOYO SUTOYO Sutoyo Sutoyo Ulya, Ghea Karilla Warnita Yusniwati Yusniwati Zahlul Ikhsan