Putri, Rachma Ryanda (2026) Uji Efektivitas Serbuk Serai (Cymbopogon citratus) dan Sirsak (Annona muricata) Sebagai Pestisida Nabati Pengendali Hama Boleng (Cylas formicarius) pada Ubi Jalar (Ipomoea batatas). Undergraduate thesis, upn veteran jawa timur.
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Abstract
The sweet potato weevil, Cylas formicarius (Fabricius), represents a major biotic constraint in stored sweet potato (Ipomoea batatas L.), capable of causing complete crop loss. This study evaluated the insecticidal efficacy of powdered Cymbopogon citratus (lemongrass) stems and Annona muricata (soursop) leaves against adult C.formicarius under storage conditions. A completely randomized factorial design was employed, incorporating three powder types (lemongrass, soursop, and their combination) at four dosage levels (0, 10, 20, and 30 g per 100 g of tubers), each replicated three times. Parameters assessed included adult mortality, toxicity indices (LC50 and LT50), tuber weight loss, and bioactive compound profiling via GC-MS. Soursop leaf powder at 30 g exhibited the highest mortality rate (96.67%) by day seven, with superior toxicity values (LC50 11.90 g; LT50 7.03 days). Both lemongrass and the combination treatment effectively suppressed tuber weight loss to 5.67 g, significantly outperforming the control (19.00 g). GC-MS analysis identified citral and β-myrcene in lemongrass, and myristic acid in soursop, compounds known for their neurotoxic and metabolic inhibitory effects on insects. These findings suggest that A. muricata leaf powder, in particular, holds promise as an environmentally sustainable botanical protectant for managing C. formicarius infestation in post-harvest sweet potato. Keywords: bioactive compounds, botanical insecticide, pest management, post-harvest pests, tuber weight loss.
| Item Type: | Thesis (Undergraduate) | ||||||||||||
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| Subjects: | S Agriculture > SB Plant culture > SB950-989 Pest Control and Treatment of Diseases, Plant Protection | ||||||||||||
| Divisions: | Faculty of Agriculture > Departement of Agritechnology | ||||||||||||
| Depositing User: | Ryanda Putri Rachma | ||||||||||||
| Date Deposited: | 06 Mar 2026 07:57 | ||||||||||||
| Last Modified: | 06 Mar 2026 07:57 | ||||||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/50199 |
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