Mohan Lalit, Sharma Preeti, Srivastava C N
Applied Entomology and Vector Control Laboratory, Department of Zoology, Faculty of Science, Dayalbagh Educational Institute, Deemed University, Dayalbagh, Agra, India.
Southeast Asian J Trop Med Public Health. 2007 Mar;38(2):256-60.
With a goal of minimal application of environmentally hazardous chemical insecticides, the larvicidal activity of cypermethrin was studied alone and in combination with the root extract of Solanum xanthocarpum against anopheline larvae. Petroleum ether extract was observed to be the most toxic, with LC,, of 1.41 and 0.93 ppm and LC90 of 16.94 and 8.48 ppm at 24 and 48 hours after application, respectively, followed by carbon tetrachloride and methanol extracts. The values for cypermethrin were an LC50 of 0.0369 ppm after 24 hours and 0.0096 ppm after 48 hours and LC90 of 0.0142 and 0.0091 ppm after 24 and 48 hours, respectively. The ratios of cypermethrin and petroleum ether extracts tested were 1:1, 1:2 and 1:4. Of the various ratios tested, the cypermethrin and petroleum ether extract ratio of 1:1 was observed to be more efficient than the other combinations. From the individual efficacy of each constituent, synergism was noted. This is an ideal ecofriendly approach for the control of malaria vector, Anopheles stephensi.
以尽量减少使用对环境有害的化学杀虫剂为目标，研究了氯氰菊酯单独以及与黄果茄根提取物联合对按蚊幼虫的杀幼虫活性。观察到石油醚提取物毒性最大，在施用后24小时和48小时的LC50分别为1.41和0.93 ppm，LC90分别为16.94和8.48 ppm，其次是四氯化碳和甲醇提取物。氯氰菊酯的值在24小时后为0.0369 ppm，48小时后为0.0096 ppm，24小时和48小时后的LC90分别为0.0142和0.0091 ppm。测试的氯氰菊酯与石油醚提取物的比例为1:1、1:2和1:4。在测试的各种比例中，观察到氯氰菊酯与石油醚提取物比例为1:1比其他组合更有效。从每种成分的单独功效来看，存在协同作用。这是控制疟疾媒介斯氏按蚊的理想环保方法。
