Citation
Norlyiana N. R. Azmee, . and Chin, Wen Koid and Gaik, Ee Lee and Thilahgavani Nagappan, . and Muhammad Zulhilmi Ramlee, . and Wahizatul Afzan Azmi, . and Nur Fariza M. Shaipulah, . (2025) Bazzania spiralis extracts exhibit effective toxicity and oviposition deterrence against Bemisia tabaci. Pertanika Journal Tropical Agricultural Science (Malaysia), 48 (3). pp. 1055-1070. ISSN 1511-3701
Abstract
The silverleaf whitefly, Bemisia tabaci, is a major agricultural pest that has developed resistance to many synthetic pesticides, necessitating the search for effective, eco-friendly alternatives. This study investigated the insecticidal potential of crude methanol extracts from the liverwort Bazzania spiralis against B. tabaci. Toxicity assays demonstrated 100% mortality achieved at 1000μg/ml after 48 hours of exposure. The LC₅₀ values ranged from 699.37μg/ml (12 hours) to 22.00μg/ml (60 hours). The extracts exhibited strong oviposition deterrence (31.5%) and reduced egg hatchability (39.39%) at 500μg/ml. Gas chromatography-mass spectrometry analysis revealed eleven compounds in the extract, with sesquiterpenes (59%) and fatty acids (35.4%) as major constituents. The predominant compounds were spathulenol (48.7%) and palmitic acid ethyl ester (22.2%). These findings suggest that Bazzania spiralis extracts have potential as a natural alternative to synthetic pesticides for B. tabaci management. Further research is needed to isolate active compounds, evaluate field efficacy, and assess environmental persistence and effects on beneficial insects.
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Abstract
The silverleaf whitefly, Bemisia tabaci, is a major agricultural pest that has developed resistance to many synthetic pesticides, necessitating the search for effective, eco-friendly alternatives. This study investigated the insecticidal potential of crude methanol extracts from the liverwort Bazzania spiralis against B. tabaci. Toxicity assays demonstrated 100% mortality achieved at 1000μg/ml after 48 hours of exposure. The LC₅₀ values ranged from 699.37μg/ml (12 hours) to 22.00μg/ml (60 hours). The extracts exhibited strong oviposition deterrence (31.5%) and reduced egg hatchability (39.39%) at 500μg/ml. Gas chromatography-mass spectrometry analysis revealed eleven compounds in the extract, with sesquiterpenes (59%) and fatty acids (35.4%) as major constituents. The predominant compounds were spathulenol (48.7%) and palmitic acid ethyl ester (22.2%). These findings suggest that Bazzania spiralis extracts have potential as a natural alternative to synthetic pesticides for B. tabaci management. Further research is needed to isolate active compounds, evaluate field efficacy, and assess environmental persistence and effects on beneficial insects.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | plant extracts |
| AGROVOC Term: | pest control |
| AGROVOC Term: | chemical analysis |
| AGROVOC Term: | Bemisia tabaci |
| AGROVOC Term: | fatty acids |
| AGROVOC Term: | toxicity |
| AGROVOC Term: | mortality |
| AGROVOC Term: | egg hatchability |
| Geographical Term: | Malaysia |
| Depositing User: | Ms. Azariah Hashim |
| Date Deposited: | 07 May 2026 08:38 |
| Last Modified: | 07 May 2026 08:38 |
| URI: | http://webagris.upm.edu.my/id/eprint/25297 |
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