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首页> 外文期刊>Parasitology Research >Laboratory and field evaluation of medicinal plant extracts against filarial vector, Culex quinquefasciatus say (Diptera: Culicidae)
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Laboratory and field evaluation of medicinal plant extracts against filarial vector, Culex quinquefasciatus say (Diptera: Culicidae)

机译：药用植物提取物针对丝状载体的实验室评价和野外评价，Culex quinquefasciatus（Diptera：Culicidae）

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摘要

The present study explored the effects of Jatropha curcas, Hyptis suaveolens, Abutilon indicum, and Leucas aspera tested against third instar larvae of filarial vector, Culex quinquefasciatus. The dried plant materials were powdered by an electrical blender. From each sample, 500 g powder was macerated with 1.5 L of hexane, chloroform, ethyl acetate, and methanol 8h, using Soxhlet apparatus, and filtered. The extracts were concentrated at reduced temperature on a rotary evaporator and stored at a temperature of 4°C. The yield of crude extract was 11.4, 12.2, 10.6, and 13.5 g in hexane, chloroform, ethyl acetate, and methanol, respectively. The hexane, chloroform, ethyl acetate, and methanol extract of J. curcas with LC 50 values of 230.32, 212.85, 192.07, and 113.23 ppm; H. suaveolens with LC 50 values of 213.09, 217.64, 167.59, and 86.93 ppm; A. indicum with LC 50 values of 204.18, 155.53, 166.32, and 111.58 ppm; and L. aspera with LC 50 values of 152.18, 118.29, 111.43, and 107.73 ppm, respectively, against third instar larvae of C. quinquefasciatus. The larval mortality was observed after 24 h of exposure. Maximum larvicidal activity was observed in the methanolic extract followed by ethyl acetate, chloroform, and hexane extract. No mortality was observed in the control. The observed mortality were statistically significant at P0.05 level. L. aspera showed the highest mortality rate against the mosquito larvae in laboratory and field. The larval density was decreased after the treatment of plant extracts at the breeding sites (sewage water), and hence, these plant extracts of the suitable alternatives of synthetic insecticides for the mosquito vector management. The present results suggest that the medicinal plants extract was an excellent potential for controlling filarial vector, C. quinquefasciatus.
机译：本研究探讨了麻风树，麻疯草，Ab麻和百日草对丝状载体库克斯（Culex quinquefasciatus）第三龄幼虫的作用。干燥的植物材料通过电动搅拌机粉化。使用索格利特仪器，从每个样品中，将1.5克己烷，氯仿，乙酸乙酯和甲醇浸入500 g粉末中8小时，然后过滤。将提取物在旋转蒸发仪上在减压下浓缩，并在4℃的温度下储存。在己烷，氯仿，乙酸乙酯和甲醇中，粗提取物的产量分别为11.4、12.2、10.6和13.5 g。麻疯树的己烷，氯仿，乙酸乙酯和甲醇提取物，LC 50值为230.32、212.85、192.07和113.23 ppm; LC 50值为213.09、217.64、167.59和86.93 ppm的嗜酸链球菌; LC 50值为204.18、155.53、166.32和111.58 ppm的A.相对于西洋参的三龄幼虫，LC 50分别为152.18、118.29、111.43和107.73 ppm。暴露24小时后观察到幼虫死亡率。在甲醇提取物中观察到最大的杀幼虫活性，然后在乙酸乙酯，氯仿和己烷提取物中观察到。在对照中未观察到死亡率。在P <0.05的水平上观察到的死亡率具有统计学意义。 L. aspera在实验室和野外显示出最高的抗蚊幼虫死亡率。在繁殖地点（污水）处理植物提取物后，幼虫密度降低，因此，这些植物提取物可作为合成杀虫剂的合适替代品，用于灭蚊载体的管理。目前的结果表明，药用植物提取物是控制丝状载体C. quinquefasciatus的极好潜力。

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