Morais Selene M, Cavalcanti Eveline S B, Bertini Luciana M, Oliveira Carla Loane L, Rodrigues Jarson Raimundo B, Cardoso José Henrique L
Curso de Química do Centro de Ciências e Tecnologia, Universidade Estadual do Ceará, Av. Paranjana 1700, Campus do Itaperi, 60740-000, Fortaleza, CE, Brazil.
J Am Mosq Control Assoc. 2006 Mar;22(1):161-4. doi: 10.2987/8756-971X(2006)22[161:LAOEOF]2.0.CO;2.
Aedes aegypti is the major vector of dengue fever, an endemic disease in Brazil. In an effort to find effective and affordable ways of controlling this mosquito, the larvicidal activities of essential oils from Croton species widely found in northeastern Brazil were analyzed. The essential oils were extracted by steam distillation, and their chemical composition was determined by gas liquid-chromatography coupled with mass spectroscopy. The main components were methyleugenol and alpha-copaene for C. nepetaefolius (LC50 of 84 ppm); alpha-pinene and beta-pinene for C. argyrophyloides (LC50 of 102 ppm); and alpha-pinene, beta-phelandrene, and trans-caryophyllene for C. sonderianus (LC50 of 104 ppm). Croton zenhtneri exhibited higher larvicidal activity with LC50 of 28 ppm, and the main active constituent was identified as anethole, a phenylpropanoid compound.
埃及伊蚊是登革热的主要传播媒介，登革热是巴西的一种地方病。为了找到控制这种蚊子的有效且经济实惠的方法，对巴西东北部广泛分布的巴豆属植物精油的杀幼虫活性进行了分析。精油通过水蒸气蒸馏法提取，其化学成分通过气相色谱-质谱联用仪测定。对于肾叶巴豆（LC50为84 ppm），主要成分是甲基丁香酚和α-可巴烯；对于银叶巴豆（LC50为102 ppm），主要成分是α-蒎烯和β-蒎烯；对于桑德氏巴豆（LC50为104 ppm），主要成分是α-蒎烯、β-苯并菲和反式石竹烯。泽氏巴豆表现出更高的杀幼虫活性，LC50为28 ppm，主要活性成分被鉴定为茴香脑，一种苯丙素类化合物。
