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Larvicidal efficacy of monoterpenes against the larvae of Anopheles gambiae

Asian Pacific Journal of Tropical Biomedicine 2016年第4期6卷 290-294页

作者： Eliningaya J.Kweka Tamires Cardoso Lima chrian m.marciale Dami?o Pergentino de Sousa Division of Livestock and Human Diseases Vector Control Tropical Pesticides Research Institute Department of medical Parasitology and Entomology Catholic University of Health and Allied Sciences Department of Pharmacy Federal University of Sergipe Department of Pharmaceutical Sciences Federal University of Paraíba

Objective:To evaluate the larvicidal efficacy of eight volatile components of essential oils against 3rd instar larvae of Anopheles gambiae ***:Larvicidal effects of each compound were evaluated in both laboratory and semi-field *** solution was prepared and serial dilutions were made in six concentrations for each compound.A total of 20 larvae were exposed to larvicides for each replicate and monitored at intervals of 12,24,48 and 72 *** monitoring was done on basis of dead and live larvae in all ***:All assayed compounds were larvicides and presented varying degrees of larval toxicity,with LC50 values ranging from 1.28 to 1 938.92 mg/L depending on the treatment time(12,24,48 or 72 h).(-)-Perillyl alcohol presented the strongest larvicidal activity towards Anopheles gambiae larvae,with LC_(50) values of 73.60,18.36,1.72 and1.28 mg/L after 12,24,48 and 72 h of exposure,*** next strongest were(-)-isopulegol(LC_(50)= 135.10,49.39,34.39 and 20.22 mg/L) and(-)-carvone epoxide(LC_(50)= 168.86,124.74,80.84 and 23.46 mg/L).After 12,24 and 48 h of treatment,hydroxydihydrocarvone was the least toxic compound,with LC_(50) values of 1 938.92,1 172.18 and 401.03 mg/L,***:The data obtained in this study suggest that all evaluated monoterpenes,especially(-)-perillyl alcohol,have remarkable larvicidal effects and may be considered as potential sources for the development of suitable natural larvicides for mosquito management *** small-scale field trials should be conducted.

关键词： Larvicidal activity malaria Anopheles gambiae s.s. Essential oils monoterpenes Natural products mosquito

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