Singh S P, Raghavendra K, Thomas T G
National Institute of Malaria Research (ICMR), Sec-8, Dwarka, New Delhi-110077, India.
J Commun Dis. 2011 Dec;43(4):237-41.
Crude aqueous and acetone extracts of leaf of Trianthema portulacastrum was evaluated for its mosquito larvicidal properties against the larvae of four vector species of mosquito under laboratory conditions. These extracts showed good larvicidal properties, 100% mortality in the third instar larvae was observed in the larval bioassay test with Anopheles culicifacies, Anopheles stephensi, Culex quinquefasciatus and Aedes aegypti at a concentration of 1.0, 0.75, 0.75 and 1.0% respectively. The LD50 values estimated for aqueous extract against the larvae of An. culicifacies, An. stephensi, Cx. quinquefasciatus and Ae. aegypti were 0.17, 0.15, 0.18 and 0.17% and LD90 values were 0.57, 0.58, 0.76, and 0.75% respectively. The LD50 values estimated for acetone extract against the larvae of An. culicifacies, An. stephensi, Cx. quinquefasciatus and Ae. aegypti were 0.09, 0.10, 0.09 and 0.12 % and LD90 values were 0.28, 0.25, 0.26 and 0.26% respectively. It is observed that the acetone extract is more effective as compared to aqueous extract. Trianthema portulacastrum can be considered as a probable source of photochemical used for the development of larvicide against disease vectors.
在实验室条件下，对马齿苋科植物松叶牡丹的叶的粗水提取物和丙酮提取物进行了抗四种蚊虫媒介幼虫的杀蚊幼虫特性评估。这些提取物显示出良好的杀幼虫特性，在对库氏按蚊、斯氏按蚊、致倦库蚊和埃及伊蚊进行的幼虫生物测定试验中，分别在浓度为1.0%、0.75%、0.75%和1.0%时观察到三龄幼虫100%死亡。针对库氏按蚊、斯氏按蚊、致倦库蚊和埃及伊蚊幼虫的水提取物估计的半数致死剂量（LD50）值分别为0.17%、0.15%、0.18%和0.17%，90%致死剂量（LD90）值分别为0.57%、0.58%、0.76%和0.75%。针对库氏按蚊、斯氏按蚊、致倦库蚊和埃及伊蚊幼虫的丙酮提取物估计的LD50值分别为0.09%、0.10%、0.09%和0.12%，LD90值分别为0.28%、0.25%、0.26%和0.26%。观察到丙酮提取物比水提取物更有效。松叶牡丹可被视为用于开发针对病媒的杀幼虫剂的可能的光化学物质来源。
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