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All Journal Kultivasi Jurnal Biodjati Bioeksperimen
Yudistira, Dwi Harya
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences

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Role and key species of freshwater snails in enhancing plant growth performance of duckweeds (Spirodela polyrhiza) in rice paddy fields Yudistira, Dwi Harya; Gunawan, Fariz Ardiansyah; Arif, Shahla Aurelia; Sato, Satoru
Kultivasi Vol 24, No 1 (2025): Jurnal Kultivasi
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/kultivasi.v24i1.61084

Abstract

Freshwater snails are widely distributed in the rice field ecosystem. Freshwater snails’ feeding and metabolic activities can potentially increase the complexity of freshwater ecosystems, particularly through the nutrient cycle. Cipangopaludina chinensis, Physa acuta, and Semisulcospira libertina are commonly found in Japan's paddy field ecosystems. Spirodela polyrhiza is expected to support biodiversity, improve soil fertility, and reduce greenhouse gas emissions in paddy field ecosystems, while providing food and shelter for the snails.  In this study, we investigated the effects of these three snail species on the growth of Spirodela polyrhiza. The results showed that the presence of P. acuta or C. chinensis could promote the growth of S. polyrhiza compared with the presence of S. libertina, a mix, and the control. The relative growth rate for S. polyrhiza in the presence of P. acuta, C. chinensis + P. acuta, and C. chinesis was 1.10 ± 0.39, 1.10 ± 0.39, and 1.06 ± 0.31 fronds/day, respectively. In the S. libertina treatment, the number of S. polyrhiza fronds decreased as the snails consumed the plants. The number of fronds on the last day of treatment was 1.10 ± 1.10 fronds with a relative growth rate of 0.004 ± 0.030 fronds/day, whereas for the combination of C. chinensis + S. polyrhiza it was 4.80 ± 3.32 and 8.70 ± 3.61 fronds, respectively, with relative growth rate 0.13 ± 0.05 and 0.275 ± 0.06 fronds/day, respectively. Interestingly, these interspecific interactions increased S. polyrhiza performance, as indicated by greater frond length, root length, and frond chlorophyll content. This study highlights that interspecific interactions create complexity in the paddy field ecosystem, providing good conditions for biodiversity and indirectly supporting rice production.
Effectiveness of Modified Traps for Protection Against Fruit Flies on Mango Susanto, Agus; Sudarjat, Sudarjat; Yulia, Endah; Permana, Agus Dana; Gunawan, Aries; Yudistira, Dwi Harya
Jurnal Biodjati Vol 5 No 1 (2020): May
Publisher : UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/biodjati.v5i1.7926

Abstract

Mango is one of the primary fruit export commodities in Indonesia. The productivity of mango can be increased by controlling the pest population, including fruit flies Bactrocera spp. Various efforts to control the population of fruit flies have been carried out, either by implementing traditional methods or by using synthetic pesticides. However, synthetic pesticides can cause pollution, and therefore we need to control the fruit flies’ population by using the most effective fruit fly trap mode. The study was conducted in the mango yield (monoculture) of Department of Agriculture in Majalengka. The traps in this study were modified Steiner traps with funnels, modified Steiner traps without funnels, bottle traps with funnels, bottle traps without funnels, and modified gypsy moth traps. Each trap was fed with 0.2 ml of Methyl eugenol dripped on a cotton roll and hung in the trap. The results showed that the number of fruit flies caught in each trap every week is significantly different. The highest number of fruit flies caught in each trap every week was achieved by bottle traps without funnels that caught 135 flies, while the lowest number of fruit flies caught was recorded by the gypsy moth traps with 16 flies. The transparent color of the bottles and a large number of holes effectively lured the fruit flies into the bottle traps without funnels.
Integrating BSF larvae for the sustainable bioconversion of banana peels and sprout hulls waste Rizkawati, Vina; Andhini, Shabrina Lathiifah; Noer, Mohamad Isnin; Yudistira, Dwi Harya; Kurniati, Tri Handayani; Lisanti, Elsa; Komala, Ratna; Herlin, Weri
Bioeksperimen: Jurnal Penelitian Biologi March 2026
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/bioeksperimen.v12i1.13637

Abstract

The management of organic waste presents a significant challenge in Indonesia, especially fruit and vegetable by-products. Black Soldier Fly (BSF, Hermetia illucens) larvae offer an effective solution due to their high potential for organic waste conversion. This study investigated the efficacy of BSF larvae in reducing and bioconverting organic waste composed of banana peels and sprout hulls, and examined the influence of EM4 fermentation on larval growth performance. Waste Reduction Index (WRI) and bioconversion rate (BCR) were calculated as percentages and analyzed descriptively, followed by the Kruskal–Wallis test. Furthermore, larval length and body weight were measured at 7, 11, 14, and 18 days of larval age and analyzed using Kruskal–Wallis with Dunn’s post-hoc test. The results showed that EM4–fermented substrates containing a 1:3 ratio of banana peels to sprout hulls showed the highest waste reduction and bioconversion potential among all mixture treatments (P < 0.05). Although larval length and weight were lower than control substrate, no significant difference in larval length was detected, while individual larval weight was significantly higher compared to other organic waste combinations (P < 0.001). In this study, EM4 fermentation enhanced lignocellulosic degradation, improving substrate digestibility for BSF larvae and optimizing bioconversion efficiency, thus supporting more sustainable organic waste management strategies.
Co-Authors Agus Dana Permana Agus Susanto Andhini, Shabrina Lathiifah Arif, Shahla Aurelia Elsa Lisanti Endah Yulia Gunawan, Aries Gunawan, Fariz Ardiansyah Mohamad Isnin Noer Ratna Komala, Ratna Rizkawati, Vina Satoru Sato, Satoru Sudarjat Sudarjat Tri Handayani Kurniati Weri Herlin