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Oktaviani

Plantation Crop Production Technology Study Program, Sriwijaya State Polytechnic, Jalan Sekojo No. 21, Kedondong Raye Village, Banyuasin III District, Banyuasin Regency 30139, South Sumatra, Indonesia

Author-ID : 10375985

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Heterogeneity of Arthropods on Polyculture System using Biopesticide of Chromolaena odorata and Eggshells Mixture Weri Herlin; Oktaviani Oktaviani; Fadhil Muhammad Raihan
Jurnal Ilmu Pertanian Vol 11, No 2 (2026): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.117972

Maize and chili polyculture systems have the potential to enhance agroecosystem productivity, but their effectiveness is strongly influenced by the dynamics of arthropods, including phytophages, predators, parasitoids, decomposers, and pollinators. This study inventoried arthropod communities by analyzing the abundance of ecological groups and calculating diversity, evenness, and dominance index. The aim was to provide an ecological foundation to strengthen integrated pest management and support the implementation of sustainable agriculture in line with Asta Cita's development direction. The research was conducted at the Agro Training Centre, Faculty of Agriculture, Sriwijaya University. To obtain samples in the maize–chili polyculture system, several types of traps were used, including yellow sticky traps, methyl eugenol traps, pitfall traps, pan traps, light traps, sweep nets, and visual traps, which were placed in each planting bed. All traps except the light trap were installed between 06:00 and 07:00 and operated for 24 hours, except for the light trap, which was installed at 18:00 and operated for 12 hours. The diversity index obtained was H' = 1.15, indicating a medium category; the evenness value (E = 0.48) showed that species distribution was uneven; and the dominance index (D = 0.30) suggested the presence of a sub-dominant species. The most frequently captured species was Bactrocera sp 1, belonging to the order Diptera and functioning as a phytophage. Clustering analysis indicated a correlation between Bactrocera sp 1 and Bactrocera sp 2. Overall, the dominant arthropod functional group in the maize–chili polyculture system was phytophagous species.

Natural pest control diversity on Oryza sativa L. (Poaceae) managed in organic and conventional cultivation systems in Desa Tegal Sari, Ogan Komering Ulu Timur, South Sumatera Gilang Putra Bintang; Weri Herlin; Chandra Irsan; Oktaviani Oktaviani
Bioma Vol. 21 No. 2 (2025): Bioma
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/bioma.v21i2.54756

Natural controls, such as predators and parasitoids, play a crucial role in maintaining the stability of agricultural ecosystems through biological pest control mechanisms. On the rice agriculture systems, we propose to evaluate the diversity and abundance of natural controls in organic and conventional rice cultivation systems in Tegal Sari Village, Ogan Komering Ulu Timur Regency, South Sumatra. Observations were conducted using a systematic survey method employing various types of insect traps, with organism identification carried out to the level of type. This research is expected to contribute to both academic and practical domains. The results revealed the presence of 10 arthropod species from four orders, including Araneae, with dominant species such as Pardosa pseudoannulata, Tetragnatha extensa, Tetragnatha montana, Tetragnatha sp., Tigrosa annexa, and Zygiella are always higher on the organic rice agricultural system compared to the conventional system. The diversity analysis indicated that sweep nets were more effective in capturing natural controls compared to other traps, with a Shannon-Wiener diversity index value of 2.17, suggesting moderate diversity. These findings emphasize that organic farming supports biodiversity conservation and provides a scientific foundation for the development of pest management strategies.

Heterogeneity of Arthropods on Polyculture System using Biopesticide of Chromolaena odorata and Eggshells Mixture Weri Herlin; Oktaviani Oktaviani; Fadhil Muhammad Raihan
Jurnal Ilmu Pertanian Vol 11, No 2 (2026): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ipas.117972

Maize and chili polyculture systems have the potential to enhance agroecosystem productivity, but their effectiveness is strongly influenced by the dynamics of arthropods, including phytophages, predators, parasitoids, decomposers, and pollinators. This study inventoried arthropod communities by analyzing the abundance of ecological groups and calculating diversity, evenness, and dominance index. The aim was to provide an ecological foundation to strengthen integrated pest management and support the implementation of sustainable agriculture in line with Asta Cita's development direction. The research was conducted at the Agro Training Centre, Faculty of Agriculture, Sriwijaya University. To obtain samples in the maize–chili polyculture system, several types of traps were used, including yellow sticky traps, methyl eugenol traps, pitfall traps, pan traps, light traps, sweep nets, and visual traps, which were placed in each planting bed. All traps except the light trap were installed between 06:00 and 07:00 and operated for 24 hours, except for the light trap, which was installed at 18:00 and operated for 12 hours. The diversity index obtained was H' = 1.15, indicating a medium category; the evenness value (E = 0.48) showed that species distribution was uneven; and the dominance index (D = 0.30) suggested the presence of a sub-dominant species. The most frequently captured species was Bactrocera sp 1, belonging to the order Diptera and functioning as a phytophage. Clustering analysis indicated a correlation between Bactrocera sp 1 and Bactrocera sp 2. Overall, the dominant arthropod functional group in the maize–chili polyculture system was phytophagous species.

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