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All Journal Jurnal Biologi Tropis CELEBES Agricultural
Hiksa Maulana Saputra
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Trophic Interaction of Spodoptera frugiperda and their Egg Parasitoids in Agricultural Landscape Kalinyo, Daniel; Andrianto Kupepe; Dendi Ferdianto; Ismail Djamaludin; Hiksa Maulana Saputra; Mihwan Sataral
CELEBES Agricultural Vol. 4 No. 2 (2024): CELEBES Agricultural
Publisher : Faculty of Agriculture, Tompotika Luwuk University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52045/jca.v4i2.717

Abstract

Trophic interactions between Spodoptera frugiperda and its parasitoids are crucial for effective biological control strategies. Understanding these interactions is essential for developing methods that mitigate pest impacts on crops while preserving agroecosystem balance. This study aims to (a) evaluate the interactions between S. frugiperda and its parasitoids, (b) explore the relationship between landscape composition and parasitism levels of S. frugiperda, and (c) analyze how landscape composition influences the food web metrics of S. frugiperda and its parasitoids. The findings identified three egg parasitoid species—Telenomus sp1, Telenomus sp2, and Trichogramma sp—parasitizing S. frugiperda, with Telenomus sp1 emerging as the dominant parasitoid and a potential biological control agent. Notably, landscape composition did not significantly affect the parasitization rate of S. frugiperda eggs. However, the age of maize plants positively influenced the parasitization rate, indicating that older plants may enhance the parasitization of S. frugiperda eggs. Landscape composition, particularly in agricultural contexts, positively influenced Shannon diversity while negatively affecting interaction evenness. In contrast, semi-natural habitats enhanced interaction evenness. These findings highlight the significance of landscape composition in understanding the complexity of the S. frugiperda-parasitoid food web, providing valuable insights for developing pest control strategies for S. frugiperda and conserving natural enemies.
Water Content, Physical Quality of Seeds and Post-Harvest Fungal Attacks on Peanuts Miladiarsi, Miladiarsi; Tsaniyah, Barokati; Putri, Riska Awalia; Saputra, Hiksa Maulana; Sianturi, Yosua Pangihutan Pardamean Alextio
Jurnal Biologi Tropis Vol. 25 No. 3 (2025): Juli-September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v25i3.9754

Abstract

The decline in peanut seed quality can result from improper post-harvest handling, including drying, pod peeling, and storage, which can damage the seeds and reduce their quality. Damaged seeds and high water content facilitate fungal growth on peanuts. Maintaining and ensuring peanut quality during market storage is very important. This study aims to examine the relationship between air content, the percentage of damaged seeds, and the percentage of seeds infected by post-harvest fungal species in peanut seeds. The experimental method involved measuring air content with a DELMHORST Model G-7 Moisture Meter. The physical quality of seeds was assessed based on the percentages of intact, wrinkled, and damaged seeds. To determine the percentage of seeds infected with fungi, the direct planting method was used, employing Dichloran 18% Glycerol Agar (DG18+) media. The results indicated that each sample’s air content was within the normal range of 8-9%, but the physical quality of the seeds was 59.7%, associated with fungal attacks by species including Aspergillus flavus, A. niger, A. tamari, Fusarium semitechtum, Mucor sp., Eurotium repens, and E. chevalieri. These findings suggest that air content and seed damage influence fungal diversity, providing valuable insights for maintaining peanut seed quality during the post-harvest process until they reach the market.
Co-Authors Andrianto Kupepe Dendi Ferdianto Ismail Djamaludin Kalinyo, Daniel Mihwan Sataral Miladiarsi, Miladiarsi Putri, Riska Awalia Sianturi, Yosua Pangihutan Pardamean Alextio Tsaniyah, Barokati