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EFFECTIVENESS TESTS OF VEGETABLE INSECTICIDES ESSENTIAL OILS OF MUTMET SEED (Myristica fragrans Houtt.) AND CLOVE FLOWER (Syzygium aromaticum L.) ON RICE BEETLE MORTALITY AND DEVELOPMENT Sitophilus oryzae (Linnaeus, 1763) Fadhila, Fasya; Hariani, Nova; Patang, Fatmawati
Jurnal Pendidikan Matematika dan IPA Vol 14, No 2 (2023): July 2023
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jpmipa.v14i2.65300

Abstract

This study aims to analyze the inhibition of the development of the F1 generation of rice beetles by nutmeg and clove flower essential oils, and to determine the mortality of rice beetles against nutmeg and clove flower essential oils. The stages of the research started from rearing the rice beetle, preparing test insects, making variations in doses, treatments, and analysis. Two tests were conducted in the study, the first for inhibition of F1 generation activity and the percentage of mortality using the contact method (filter paper). The results showed that nutmeg and clove oil had an effect on the inhibition of the rice beetle F1 generation. Nutmeg oil has the best inhibition power with the percentage of F1 generation inhibition up to 100%. The mortality test using the filter paper method showed that for 48 hours nutmeg essential oil was able to kill rice beetles at all concentrations, namely 5-20% to 100%, while the percentage of 100% mortality was only found in the treatment with clove oil at the highest concentration (20%). The results showed that nutmeg oil showed better results than clove oil for controlling S. oryzae warehouse pests.  
Spatial Variation in Water Quality Based on Biotic Indices Along Urban River Reservoir Continuum in Samarinda Budiman, Budiman; Luthfiah, Khairunnisa; Patang, Fatmawati
Jurnal Biologi Tropis Vol. 26 No. 1 (2026): Januari-Maret
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.v26i1.11509

Abstract

The Karang Mumus River and Benanga Reservoir are water bodies that play a vital role in supporting ecological functions and meeting the socio-economic needs of urban dwellers of Samarinda. However, pressure from urban anthropogenic activities has caused a decline in water quality in both water bodies. This study aims to assess water quality along the Benanga Reservoir and Karang Mumus River using benthic macroinvertebrates as ecological indicators. Macroinvertebrate benthos sampling was conducted in March 2024 in the upper, middle, and lower reaches of the Karang Mumus River, as well as the Benanga Reservoir, which is the source of the river's water flow. Furthermore, water quality assessment along these waters was determined based on the importance value index (INP), Shannon-Wiener diversity (H'), evenness (E), and Simpson dominance (D), as well as biotic indices, namely BMWP-ASPT (Biological Monitoring Working Party-Average Score Per Taxon) and FBI (Family Biotic Index). The results of the study showed that Benanga Reservoir has a fairly high diversity (H' = 2.05), with a dominance of taxa sensitive to pollution, such as the Baetidae family, indicating relatively good water conditions. BMWP-ASPT and FBI values ​​indicate that the quality of Benanga Reservoir is relatively good. In contrast, the upstream, middle, and downstream segments of the Karang Mumus River showed a gradual decline in water quality. In the middle and downstream segments, the dominance of taxa tolerant of aquatic environmental pollution, such as Lestidae and Tubificidae, was observed, along with a high FBI value (9.49), indicating that the water is highly polluted with organic materials.