Govindarajan M, Jebanesan A, Pushpanathan T
Division of Phytochemistry and Vector Biology, Department of Zoology, Annamalai University, Annamalai Nagar, 608 002, Tamil Nadu, India.
Parasitol Res. 2008 Jan;102(2):289-92. doi: 10.1007/s00436-007-0761-y. Epub 2007 Nov 8.
Methanolic leaf extract of Cassia fistula was tested for larvicidal and ovicidal activity against Culex quinquefasciatus and Anopheles stephensi. The extract was found to be more lethal to the larvae of A. stephensi than C. quinquefasciatus with LC(50) values of 17.97 and 20.57 mg/l, respectively. Mean percent hatchability of the ovicidal activity was observed 120 h after treatment. The percent hatchability was inversely proportional to the concentration of extract and directly proportional to the eggs. The egg raft of C. quinquefasciatus was found to be more hatchable than A. stephensi. The results show that the leaf extract of C. fistula is promising as a larvicidal and ovicidal agent against C. quinquefasciatus and A. stephensi.
对决明子的甲醇叶提取物进行了针对致倦库蚊和斯氏按蚊的杀幼虫及杀卵活性测试。结果发现，该提取物对斯氏按蚊幼虫的致死性高于致倦库蚊，其LC(50)值分别为17.97和20.57毫克/升。在处理后120小时观察杀卵活性的平均孵化率百分比。孵化率百分比与提取物浓度成反比，与卵数成正比。发现致倦库蚊的卵块比斯氏按蚊的更易孵化。结果表明，决明子叶提取物有望成为针对致倦库蚊和斯氏按蚊的杀幼虫及杀卵剂。
