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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/44954

Title: Larvicidal efficacy of Catharanthus roseus Linn. (Family: Apocynaceae) leaf extract and bacterial insecticide Bacillus thuringiensis against Anopheles stephensi Liston
Authors: Chellasamy Panneerselvam
Kadarkarai Murugan
Kalimuthu Kovendan
Palanisamy Mahesh Kumar
Sekar Ponar ulselvam
Duraisamy Amerasan
Jayapal Subramaniam
Jiang–Shiou Hwang
Contributors: 國立臺灣海洋大學:海洋生物研究所
Keywords: Anopheles stephensi;Bacillus thuringiensis;Catharanthus roseus;Larvicidal activity
Date: 2013-11
Issue Date: 2017-12-14T08:10:03Z
Publisher: Asian Pacific Journal of Tropical Medicine
Abstract: Abstract:
Objective
To explore the larvicidal activity of Catharanthus roseus (C. roseus) leaf extract and Bacillus thuringiensis (B. thuringiensis) against the malarial vector Anopheles stephensi (An. stephensi), when being used alone or together.

Methods
The larvicidal activity was assayed at various concentrations under the laboratory and field conditions. The LC50 and LC90 values of the C. roseus leaf extract were determined by probit analysis.

Results
The plant extract showed larvicidal effects after 24 h of exposure; however, the highest larval mortality was found in the petroleum ether extract of C. roseus against the first to fourth instars larvae with LC50=3.34, 4.48, 5.90 and 8.17 g/L, respectively; B. thuringiensis against the first to fourth instars larvae with LC50=1.72, 1.93, 2.17 and 2.42 g/L, respectively; and the combined treatment with LC50=2.18, 2.41, 2.76 and 3.22 g/L, respectively. No mortality was observed in the control.

Conclusions
The petroleum ether extract of C. roseus extract and B. thuringiensis have potential to be used as ideal eco–friendly agents for the control of An. stephensi in vector control programs. The combined treatment with this plant crude extract and bacterial toxin has better larvicidal efficacy against An. stephensi.
Relation: 6(11), pp.847-853
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/44954
Appears in Collections:[海洋生物研究所] 期刊論文

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