Larvicidal and repellent effect of some Tribulus terrestris L., (Zygophyllaceae) extracts against the dengue fever mosquito, Aedes aegypti (Diptera: Culicidae)

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• 作者：Tarek M.Y. El-Sheikh ; ^{Tarek_elshekh2000@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; Zarrag I.A. Al-Fifi ; Mohamed A. Alabboud
• 关键词：Ethanolic extract ; Acetone extract ; Petroleum ether extract ; Toxicity ; Repellent ; Tribulus terrestris ; Aedes aegypti
• 刊名：Journal of Saudi Chemical Society
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：20
• 期：1
• 页码：13-19
• 全文大小：364 K

文摘

Aedes aegypti transmits etiologic agents of yellow fever and dengue. Vaccine for dengue virus is not available and vector control is essential to minimize dengue incidence. The larvicidal and repellent effect of the crude ethanol, acetone and petroleum ether extract leaves of Tribulus terrestris, against 3rd instar larvae and adults of mosquito, Ae. aegypti the vector of dengue fever was evaluated. The efficacy of petroleum ether extract seemed to be more effective with LC₅₀ 64.6 ppm followed by acetone extract with LC₅₀ 173.2 ppm and finally ethanolic extract with LC₅₀ 376.4 ppm. Moreover, the acetone and petroleum ether extracts exerted a highly delayed toxic effect on the pupae and adults resulted from treated larvae, where the pupal mortality was 57.1% and 100% at concentrations 400 and 100 ppm, respectively. Also, the petroleum ether and acetone extracts showed reduction effects on adult emergence. The repellent action of the plant extracts tested was varied depending on the solvent used in extraction and the dose of the extract. The most effective plant extract that evoked 100% repellency or biting deterrence was petroleum ether extract at a dose of 1.5 mg/cm² compared with 100% repellency for commercial formulation, N,N-diethyl-3-methylbenzamide (DEET) at the same dose. Hence, these extracts can be used as an effective alternative to the existing synthetic pesticides for the control of Ae. aegypti.