Toxicity of Boswellia dalzielii (Burseraceae) Leaf Fractions Against Immature Stages of Anopheles gambiae (Giles) and Culex quinquefasciatus (Say) (Diptera: Culicidae).

International journal of insect science Pub Date : 2016-05-12 eCollection Date: 2016-01-01 DOI:10.4137/IJIS.S37188

Lame Younoussa, Elias Nchiwan Nukenine, Charles Okechukwu Esimone

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Abstract

Mosquitoes are vectors of several human pathogens, and great attention has recently been placed on insecticides from plant-derived products, in search for mosquito control agents. This study, thus, investigated the potency of Boswellia dalzielii methanol leaf extract and its four fractions as mosquito ovicide, larvicide, and pupicide against Anopheles gambiae and Culex quinquefasciatus. The plant products were tested at the following concentrations: 125, 250, 500, 1000, and 2000 ppm on eggs and 312.5, 625, 1250, and 2500 ppm on the larvae and pupae of the mosquitoes. For results, hatchability of A. gambiae eggs was reduced to 5% with n-hexane fraction at 2000 ppm. Among the plant products tested, n-hexane fraction was most toxic against A. gambiae (LC50 = 385.9 ppm) and C. quinquefasciatus (LC50 = 3394.9 ppm). The n-hexane fraction of B. dalzielii might be used as a mosquitocidal agent in the breeding sites of A. gambiae and C. quinquefasciatus.

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Boswellia dalzielii (Burseraceae) 叶子馏分对冈比亚按蚊（Giles）和库蚊（Say）（双翅目：蚤科）未成熟阶段的毒性。

蚊子是几种人类病原体的传播媒介，最近，人们对从植物中提取的杀虫剂给予了极大关注，以寻找蚊子控制剂。因此，本研究调查了乳香叶甲醇提取物及其四种馏分作为杀卵剂、杀幼虫剂和杀蛹剂对冈比亚按蚊（Anopheles gambiae）和库蚊（Culex quinquefasciatus）的效力。测试的植物产品浓度如下对卵的测试浓度分别为 125、250、500、1000 和 2000 ppm，对幼虫和蛹的测试浓度分别为 312.5、625、1250 和 2500 ppm。结果表明，正己烷馏分浓度为 2000 ppm 时，冈比亚蚊卵的孵化率降低到 5%。在测试的植物产品中，正己烷馏分对冈比亚蚊（LC50 = 385.9 ppm）和五步蛇（LC50 = 3394.9 ppm）的毒性最强。B. dalzielii 的正己烷馏分可用作冈比亚蚊和五步蛇繁殖地的杀蚊剂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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International journal of insect science

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