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All Journal Agrifor : Jurnal Ilmu Pertanian dan Kehutanan Jurnal Ilmu-Ilmu Pertanian Indonesia Jurnal Penelitian Pertanian Terapan Jurnal Biologi Tropis Jurnal Pemberdayaan: Publikasi Hasil Pengabdian Kepada Masyarakat Agroteknika Jurnal Pengelolaan Perkebunan (JPP)
Anna Kusumawati
Politeknik LPP
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Education Energy Engineering Environmental Science Immunology & microbiology Languange, Linguistic, Communication & Media Mechanical Engineering Social Sciences Other

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Influence of Rainfall and Fire Caterpillar on Oil Palm Yield at Tor Gamba Yudi Fahmi; Anna Kusumawati; Sutan Borohim Siregar
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): 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.v26i3.12224

Abstract

As a strategic plantation commodity, oil palm (Elaeis guineensis Jacq.) plays a crucial role in supporting Indonesia's national economy, yet its productivity is strongly influenced by climatic variability and pest pressure, particularly fire caterpillar (Limacodidae) attacks that damage foliage and reduce photosynthetic capacity. This study aimed to analyze the relationships between annual rainfall, fire caterpillar attack intensity, and fresh fruit bunch (FFB) productivity at PT Perkebunan Nusantara III Tor Gamba I Plantation over a five-year period (2012–2016; n = 5 annual observations). A quantitative observational-correlational design was applied using secondary archival data on rainfall (mm/year), pest attack intensity (mean larvae per frond), and FFB yield (kg/ha/year). Pearson correlation and paired T-tests were conducted at a 5% significance level (df = 3; T-table = 2.78). Rainfall showed a very strong positive correlation with FFB productivity (r = 0.95; T-count = 9.34) and a very strong negative correlation with fire caterpillar attack intensity (r = 0.98; T-count = 12.96), indicating that higher rainfall suppressed pest population growth. Furthermore, pest attack intensity had a very strong negative correlation with FFB productivity (r = 0.97; T-count = 9.83). The small sample size (n = 5) constrains statistical power and limits causal inference; results should be interpreted as descriptive associations. Nevertheless, findings suggest that rainfall monitoring could support early warning systems for pest outbreaks and inform integrated pest management strategies for oil palm plantations.
Co-Authors Adiprasetya Widyatama Agus Eka Alazis Angga Ardiansyah Benito Heru Purwanto Desra Ramadhan Putratama Ekawati, Rina Eko Hanudin Lintang Pambayun Luci Paonganan Makruf Nurudin Mohammad Sujai Mualif Muhammad Fiqi Pantja Siwi VR Ingesti Rahmi Sabrina Hamami Rina Puji Lestari Rizky Ahmad Al Farezi Romi Dongoran Siregar Saputri, Lestari Hetalesi Sutan Borohim Siregar Wini Aswari Br Barus Yudi Fahmi