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- Title
Laboratory evaluation of six crude plant extracts as repellents against larval Leptotrombidium deliense (Acari: Trombiculidae)
- Authors
Hanifah, Azima Laili; Ming, Ho Tze; Narainasamy, Vishalani Vishnu; Yusoff, Ahmad Taufik
- Abstract
Abstract: Objecive: To examine the repellency of crude plant extracts of onion (Allium cepa var. aggregatum (A. cepa)), garlic (Allium sativum (A. sativum)), clove (Syzygium aromaticum (S. aromaticum)), cinnamon (Cinnamomum zeylanicum (C. zeylanicum)), ginger (Zingiber officinale (Z. officinale)) and pandanus (Pandanus amaryllifolious (P. amaryllifolious)) on larval Leptotrombidium deliense (L. deliense). Methods: The repellency assay used is a modification of the technique developed by Azima. Extracts at different concentrations (10%, 5%, 2.5%, 1%, 0.1%, and 0.01%) were evaluated. Results: All extracts except that from ginger had similar repellencies ranging between 80%-96% at 10% concentration. At the lowest concentration (0.01%), onion extract gave the highest repellency (30%) followed by clove and cinnamon (23%). Conclusion: Generally, the plant extracts showed various degrees of repellency against the larval mites and the repellency increased with increasing concentrations of the extracts.
- Subjects
PLANT extracts; REPELLENTS; LEPTOTROMBIDIUM; TROMBICULIDAE; GARLIC; INSECT larvae
- Publication
Asian Pacific Journal of Tropical Biomedicine, 2012, Vol 2, Issue s1, pS257
- ISSN
2221-1691
- Publication type
Article
- DOI
10.1016/S2221-1691(12)60170-1