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All Journal Biodiversitas Journal of Biological Diversity
SUWANDI SUWANDI
Department of Plant Protection, Faculty of Agriculture, Universitas Sriwijaya. Jl. Raya Palembang-Prabumulih Km. 32, Ogan Ilir 30662, South Sumatra, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Soil-dwelling arthropod assemblages in maize sprayed with entomopathogenic fungi from South Sumatra, Indonesia SITI HERLINDA; MUHAMMAD YASKUR NASIR; SUWANDI SUWANDI; ERISE ANGGRAINI; CHANDRA IRSAN; JELLY MILINIA PUSPITA SARI; DELLANIA EKA RINDIANI
Biodiversitas Journal of Biological Diversity Vol. 26 No. 7 (2025)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d260730

Abstract

Abstract. Herlinda S, Nasir MY, Suwandi S, Anggraini E, Irsan C, Sari JMP, Rindiani DE. 2025. Soil-dwelling arthropod assemblages in maize sprayed with entomopathogenic fungi from South Sumatra, Indonesia. Biodiversitas 26: 3387-3396. This study examined effects of entomopathogenic fungi on abundance and species diversity of soil-dwelling arthropods associated with maize. The fungal species applied were Beauveria bassiana, Metarhizium anisopliae, and Penicillium citrinum. Pitfall traps and Berlese funnels were employed to collect arthropods soil-dwelling on the ground surface and within/below the soil, respectively. The identified arthropod guilds included predatory, herbivorous, and detritivore arthropods, with predatory arthropods being the most abundant. The arthropods were categorized into classes of Insecta, Collembola, Arachnida, and Diplopoda. The arthropods found from the ground surface and below the soil were 25 and 8 species, respectively. The total abundance (achieving 300 individuals/20 traps) of predatory arthropods did not differ significantly (P>0.05) across all treatments. The species diversity of below-ground predatory arthropods exhibited a significant decrease (P<0.05) after treatment with P. citrinum (H' from 0.71 to 0.39). The detritivore arthropod abundance from ground surface increased significantly (P<0.05) after being treated with B. bassiana (695 individuals/20 traps) compared to M. anisopliae (588 individuals/20 traps) and P. citrinum (569 individuals/20 traps) treatments. Therefore, M. anisopliae and P. citrinum could alter ground-surface arthropod assemblages. However, B. bassiana application may be integrated with soil-dwelling predatory arthropods for Integrated Pest Management (IPM) and for environmental safety.
First molecular records of bacteria infecting bagworms in oil palm plantations of South Sumatra, Indonesia ERISE ANGGRAINI; EVI RIZKYANI NASUTION; SITI HERLINDA; CHANDRA IRSAN; AHMAD MUSLIM; SUWANDI SUWANDI; NURHAYATI DAMIRI; WEI HONG LAU
Biodiversitas Journal of Biological Diversity Vol. 27 No. 1 (2026)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d270118

Abstract

Abstract. Anggraini E, Nasution ER, Herlinda S, Irsan C, Muslim A, Suwandi S, Damiri N, Lau WH. 2026. First molecular records of bacteria infecting bagworms in oil palm plantations of South Sumatra, Indonesia. Biodiversitas 26 (1): d270118. https://doi.org/10.13057/biodiv/d270118. Bagworms such as Metisa plana, Pteroma pendula, and Mahasena corbetti are major defoliating pests in oil palm ecosystems and can cause substantial yield losses during outbreaks. Despite their economic importance, information on bacteria infecting these bagworm species in Indonesia remains limited. This study presents the first molecular identification of bacterial isolates obtained from three dominant bagworm species collected in Banyuasin, South Sumatra, Indonesia. Partial 16S rRNA gene sequences were analyzed using BLASTn and Bayesian phylogenetic inference to determine their taxonomic affiliations. The isolate from P. pendula was identified as Stenotrophomonas maltophilia, forming a well-supported clade with reference sequences in the Bayesian phylogenetic tree. The isolate from M. plana showed high sequence similarity to Bacillus thuringiensis, while the isolate from M. corbetti was identified as Mammaliicoccus sciuri and clustered distinctly from Staphylococcus species. All sequences were deposited in GenBank under accession numbers PX487709.1, PX487712.1, and PX487708.1, respectively. These findings represent the first molecular records of bacteria infecting oil palm bagworms in South Sumatra and demonstrate that different bagworm species can be infected by distinct bacterial taxa. A laboratory bioassay using third-instar Spodoptera litura larvae was conducted as a preliminary assessment of biological activity, indicating variable larval responses among the bacterial isolates. While B. thuringiensis remains the only well-established entomopathogenic species, the responses observed for S. maltophilia and M. sciuri suggest that their interactions with insect hosts merit further investigation. Overall, this study provides baseline molecular evidence of bacterial infections in oil palm bagworms and contributes to a broader understanding of insect-microbe diversity in plantation ecosystems.
Outbreak and host range of Ceratocystis fimbriata ITS5 causing a lethal wilt disease on Lansium domesticum in South Sumatra, Indonesia RIKO FIRMANTO; AHMAD MUSLIM; SUWANDI SUWANDI; CHANDRA IRSAN; HARMAN HAMIDSON; RAHMAT PRATAMA; YOSSI APRIAN NURSALIM
Biodiversitas Journal of Biological Diversity Vol. 27 No. 4 (2026)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d270424

Abstract

Abstract. Firmanto R, Muslim A, Suwandi, Irsan C, Hamidson H, Pratama R, Nursalim YA. 2026. Outbreak and host range of Ceratocystis fimbriata ITS5 causing a lethal wilt disease on Lansium domesticum in South Sumatra, Indonesia. Biodiversitas 27 (4): d270424. https://doi.org/10.13057/biodiv/d270424. Lethal wilt disease, first reported on Duku (Lansium domesticum) in 2014, has rapidly expanded from Ogan Komering Ulu to multiple regencies across South Sumatra. By 2021, the epidemic reached Muara Enim, transitioning into an increasingly severe outbreak that threatens local biodiversity. This study aims to evaluate current disease development and severity in Muara Enim and characterize the genetic variation and host range of the associated pathogen. Between 2023 and 2025, we surveyed 24 L. domesticum orchards, using plots purposively positioned in high-incidence zones to document the epidemic's maximum virulence. Identification of eight fungal isolates from infected sapwood was performed via morphological observation and multi-gene phylogenetic analysis using Internal Transcribed Spacer (ITS) and -tubulin markers. Pathogenicity was confirmed by Koch’s postulates and host-range testing across diverse plant species. Molecular analysis of these representative isolates confirmed their identity as the ITS5 haplotype of Ceratocystis fimbriata, suggesting this haplotype is a key driver of the current outbreak. Results indicated high disease virulence; while regional averages varied, disease incidence reached 100% in the most severely affected orchards (e.g., Ujan Mas Lama) by June 2025. In pathogenicity trials, isolates exhibited aggressive infection patterns, producing significant lesions across all tested hosts; Parkia speciosa and Persea americana were identified as particularly vulnerable. These results indicate that C. fimbriata represents a serious threat to L. domesticum orchards and may endanger the long-term persistence of local populations in South Sumatra. To mitigate this impact, urgent management strategies are required, including the immediate removal and destruction of infected trees (sanitation felling), strict pruning hygiene to prevent wound-mediated infection, and careful selection of non-host species in mixed-planting systems.
Co-Authors AHMAD MUSLIM CHANDRA IRSAN CHANDRA IRSAN DELLANIA EKA RINDIANI ERISE ANGGRAINI ERISE ANGGRAINI EVI RIZKYANI NASUTION HARMAN HAMIDSON JELLY MILINIA PUSPITA SARI MUHAMMAD YASKUR NASIR NURHAYATI DAMIRI RAHMAT PRATAMA RIKO FIRMANTO SITI HERLINDA SITI HERLINDA WEI HONG LAU YOSSI APRIAN NURSALIM