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All Journal Biocaster : Jurnal Kajian Biologi
Sonja Verra Tinneke Lumowa
Program Studi Pendidikan Biologi, Fakultas Keguruan dan Ilmu Pendidikan, Universitas Mulawarman, Jalan Muara Pahu, Samarinda, Kalimantan Timur 75119, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology

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Pengaruh Kombinasi Pupuk Organik Cair (POC) Mikroorganisme Lokal (MOL) Nasi Basi dengan Mulsa Organik (Daun Ketapang (Terminalia catappa L) dan Pelepah Pisang (Musa sp.)) terhadap Intensitas Serangan Serangga Hama pada Tanaman Bayam Kakap (Amaranthus hybridus) Desy Amanda Putri; Sonja Verra Tinneke Lumowa; Zenia Lutfi Kurniawati; Sri Purwati
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 3 (2026): July
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i3.1327

Abstract

This study aims to determine the combination of Liquid Organic Fertilizer (POC) Local Microorganisms (MOL) stale rice with organic mulch (ketapang leaves (Terminalia catappa L) and banana stems (Musa sp.)) on the intensity of insect pest attacks on snapper spinach (Amaranthus hybridus) plants. The type of research used is experimental research. In this study, the population used was snapper spinach (Amaranthus hybridus). Observation data were analyzed using one-way ANOVA and continued with the Least Significant Difference (LSD) test at the 5% level. The results showed that the combination of POC-MOL stale rice with organic mulch ketapang leaves and banana stems had a significant effect on the intensity of pest attacks (p < 0.05). The intensity of pest attacks tended to decrease over the observation period, namely 7.34% (12 HST), 9.28% (17 HST), 6.70% (22 HST), and 5.00% (27 HST). The T4 treatment was the most effective combination in suppressing pest infestation compared to other treatments. Based on these results, it can be concluded that the combination of spoiled rice POC-MOL with organic mulch has the potential to be an environmentally friendly pest control method for spinach cultivation.
Pengaruh Pemberian Kombinasi Ekstrak Tanaman Kemangi (Ocimum basilicum) dan Daun Salam (Syzygium polyanthum) sebagai Pestisida Alami untuk Mengendalikan Serangga Hama pada Tanaman Kangkung Darat (Ipomoea reptans Poir) Noer Ashikin; Sonja Verra Tinneke Lumowa; Makrina Tindangen; Dora Dayu Rahma Turista
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.787

Abstract

The decline in land spinach (Ipomoea reptans Poir.) production is partly due to pest attacks, such as armyworms, aphids, and whiteflies. This study aims to determine the effect of a combination of basil (Ocimum basilicum) and bay leaf (Syzygium polyanthum) leaf extract as a botanical pesticide on pest attack intensity and to determine the most effective concentration. This study used a Randomized Block Design (RBD) with five treatments (0%, 30%, 40%, 50%, and 60%) and five replications. The analysis results showed that the combination of the two leaf extracts significantly reduced pest attack intensity. The 60% concentration resulted in the lowest attack intensity, at 18% (mild category), making it the most effective treatment. Thus, the combination of basil and bay leaf extracts has the potential to be an environmentally friendly botanical pesticide for pest control in land spinach.
Pengaruh Kombinasi Ekstrak Daun Keji Beling (Strobilanthes crispus) dan Daun Singkil (Premna corymbose Rottl. et Willd) terhadap Intensitas Serangan Serangga Hama pada Tanaman Terung Hijau (Solanum melongena L.) Miranda Miranda; Sonja Verra Tinneke Lumowa; Ruqoyyah Nasution; Herliani Herliani
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 1 (2026): January
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i1.1007

Abstract

This study aims to determine the effect of the combination of keji beling leaf extract (Strobilanthes crispus) and singkil leaf (Premna corymbose Rottl. et Willd) on the intensity of insect pest attacks on green eggplant (Solanum melongena L.). The study used a Randomized Block Design (RBD) with five treatments, namely control (water) and a combination of extracts at concentrations of 25%, 40%, 55%, and 70%, each repeated five times. The extract was made by maceration method using water as a solvent and additional natural adhesive (3 g detergent). Application was carried out twice per week, and the intensity of insect pest attacks was observed on days 11, 25, 39, and 53 DAP. Data were analyzed using ANOVA and the Least Significant Difference (LSD) test at a significance level of 1%. The results showed that the combination of extracts had a very significant effect on the intensity of insect pest attacks (F count > F table). The 70% concentration gave the lowest attack intensity, which was around 15%. This combination of extracts has the potential to be an environmentally friendly botanical pesticide for controlling insect pests on green eggplant plants.
Pengaruh Model Pembelajaran Guided Inquiry Berbantuan E-LKPD terhadap Kemampuan Berpikir Kritis dan Hasil Belajar Peserta Didik pada Materi Sistem Pernapasan di Kelas XI SMA Negeri 17 Samarinda Margaretha Dhea Kristiani; Sri Purwati; Herliani Herliani; Sonja Verra Tinneke Lumowa; Suparno Putera Makkadafi
Biocaster : Jurnal Kajian Biologi Vol. 6 No. 2 (2026): April
Publisher : Lembaga Pendidikan, Penelitian, dan Pengabdian Kamandanu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36312/biocaster.v6i2.1139

Abstract

This research is motivated by the lack of variety of learning models that cause students' critical thinking skills and learning outcomes to be still low. Therefore, the guided inquiry model assisted by E-LKPD is used as an alternative to facilitate the investigation process in a directed manner. This study aims to determine the effect of the guided inquiry learning model assisted by E-LKPD on students' critical thinking skills and learning outcomes in the respiratory system material of grade XI at SMA Negeri 17 Samarinda. This research is a quantitative study with a quasi-experimental type, using a non-equivalent control group design. Data collection techniques used pretest and posttest. The research sample consisted of 25 students per class. The experimental class used the guided inquiry model assisted by E-LKPD, while the control class used the Student Teams Achievement Divisions (STAD) model. The results of the t-test (independent sample t-test) showed sig. (2-tailed) of 0.000 < 0.05 and tcount > ttable, namely 4.448 ˃ 2.010 for critical thinking skills, and 4.903 ˃ 2.010 for student learning outcomes. The results of the study indicate that the guided inquiry learning model assisted by E-LKPD has a significant effect on improving critical thinking skills and student learning outcomes in the respiratory system material.
Co-Authors Desy Amanda Putri Dora Dayu Rahma Turista Herliani Herliani Makrina Tindangen Margaretha Dhea Kristiani Miranda Miranda Noer Ashikin Ruqoyyah Nasution Sri Purwati Suparno Putera Makkadafi Zenia Lutfi Kurniawati