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All Journal Tropical Plantation Journal
Idum Satia Santi
Program Studi Agroteknologi, Fakultas Pertanian, Institit Pertanian Stiper
Agriculture, Biological Sciences & Forestry

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Effect of Leaf Age on the Insecticidal Activity of Mahogany (Swietenia mahagoni Jacq.) Leaf Extract Against Setora nitens Walker Idum Satia Santi; Emmy Hamidah; Agus Manto; Indra Kurniawan; Theofilus Tejo Murti
Tropical Plantation Journal Vol 5, No 2 (2026): TROPICAL PLANTATION JOURNAL
Publisher : Akademi Komunitas Perkebunan Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56125/tpj.v5i2.112

Abstract

Setora nitens Walker is an important defoliating pest in oil palm plantations. Botanical insecticides offer an environmentally friendly alternative to synthetic pesticides for pest management. This study evaluated the influence of leaf age and concentration of mahogany (Swietenia mahagoni Jacq.) leaf extract on the mortality of S. nitens larvae. Young and mature mahogany leaves were extracted using water and applied to oil palm leaflets through a spraying method. Four extract concentrations (30%, 40%, 50%, and 60%) and an untreated control were tested. Larval mortality was observed for seven days after treatment.  All extract treatments increased larval mortality compared with the control. The highest average mortality (83.8%) was recorded in the 50% concentration of young leaf extract, while the lowest mortality (69.5%) occurred in the 30% concentration of young leaves and the 40% concentration of mature leaves. All extract treatments resulted in 100% cumulative mortality by the end of the observation period, whereas no mortality was observed in the control. Young leaf extracts generally produced higher mortality than mature leaf extracts. These findings indicate that mahogany leaf extract has potential as a botanical insecticide against S. nitens. The higher effectiveness of young leaf extracts suggests that leaf age influences the insecticidal activity of mahogany leaves.
Utilization Of Betel Leaf (Piper betle Linn.) and Lantana camara Leaf Extracts As Botanical Insecticides For Armyworm ControL (Spodoptera litura) Idum Satia Santi; Emmy Hamidah; Agus Manto
Tropical Plantation Journal Vol 5, No 1 (2026): TROPICAL PLANTATION JOURNAL
Publisher : Akademi Komunitas Perkebunan Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56125/tpj.v5i1.88

Abstract

The extensive use of synthetic insecticides has led to environmental contamination, pest resistance, and adverse effects on non-target organisms. Botanical insecticides provide a safer alternative for sustainable pest management. This study evaluated the insecticidal activity of betel leaf (Piper betle L.) and Lantana camara leaf extracts against armyworm (Spodoptera litura).  A laboratory bioassay was conducted using three extract concentrations (30%, 40%, and 50%) arranged in a completely randomized design. Larval mortality was recorded daily for seven days after application and analyzed using ANOVA followed by Duncan’s Multiple Range Test (DMRT) at a 5% significance level. Both botanical extracts significantly increased larval mortality over time. Mortality began to rise on the second day and increased sharply on the third and fourth days after application. By the fifth day, all extract treatments resulted in nearly 100% mortality, while no mortality occurred in the control. Cumulative mortality patterns indicated that Lantana camara induced a faster initial lethal effect, whereas Piper betle showed a slightly delayed but equally effective response. No significant differences were observed among concentrations, indicating that a 30% concentration was sufficient for effective control. These results highlight the potential of betel leaf and Lantana camara extracts as effective botanical insecticides for armyworm management.
Co-Authors Agus Manto Agus Manto Emmy Hamidah Emmy Hamidah Indra Kurniawan Theofilus Tejo Murti