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All Journal Biocaster : Jurnal Kajian Biologi
Herliani Herliani
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 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 Margaretha Dhea Kristiani Miranda Miranda Ruqoyyah Nasution Sonja Verra Tinneke Lumowa Sri Purwati Suparno Putera Makkadafi