Larvicidal efficacy of monoterpenes against the larvae of Anopheles gambiae

来源 :Asian Pacific Journal of Tropical Biomedicine | 被引量 : 0次 | 上传用户:fsmwx
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Objective:To evaluate the larvicidal efficacy of eight volatile components of essential oils against 3rd instar larvae of Anopheles gambiae s.s.Methods:Larvicidal effects of each compound were evaluated in both laboratory and semi-field trials.Stock solution was prepared and serial dilutions were made in six concentrations for each compound.A total of 20 larvae were exposed to larvicides for each replicate and monitored at intervals of 12,24,48 and 72 h.Larvae monitoring was done on basis of dead and live larvae in all intervals.Results:All assayed compounds were larvicides and presented varying degrees of larval toxicity,with LC50 values ranging from 1.28 to 1 938.92 mg/L depending on the treatment time(12,24,48 or 72 h).(-)-Perillyl alcohol presented the strongest larvicidal activity towards Anopheles gambiae larvae,with LC_(50) values of 73.60,18.36,1.72 and1.28 mg/L after 12,24,48 and 72 h of exposure,respectively.The next strongest were(-)-isopulegol(LC_(50)= 135.10,49.39,34.39 and 20.22 mg/L) and(-)-carvone epoxide(LC_(50)= 168.86,124.74,80.84 and 23.46 mg/L).After 12,24 and 48 h of treatment,hydroxydihydrocarvone was the least toxic compound,with LC_(50) values of 1 938.92,1 172.18 and 401.03 mg/L,respectively.Conclusions:The data obtained in this study suggest that all evaluated monoterpenes,especially(-)-perillyl alcohol,have remarkable larvicidal effects and may be considered as potential sources for the development of suitable natural larvicides for mosquito management programs.Further small-scale field trials should be conducted. Objective: To evaluate the larvicidal efficacy of eight volatile components of essential oils against 3rd instar larvae of Anopheles gambiae ss Methods: Larvicidal effects of each compound were evaluated as both laboratory and semi-field trials. Stock solution was prepared and serial dilutions were made in six concentrations for each compound. A total of 20 larvae were exposed to larvicides for each replicate and monitored at intervals of 12, 24, 48 and 72 h. Larvae monitoring was done on basis of dead and live larvae in all intervals. Results: All assayed compounds were larvicides and presented varying degrees of larval toxicity, with LC50 values ​​ranging from 1.28 to 1 938.92 mg / L depending on the treatment time (12,24,48 or 72 h). (-) - Perillyl alcohol presented the strongest larvicidal The activity towards Anopheles gambiae larvae, with LC_ (50) values ​​of 73.60, 18.36, 1.72 and 1.28 mg / L after 12, 24, 48 and 72 h of exposure, respectively.The next strongest were (-) - isopulegol 50) = 135.10, 49.39, 34.39 an after 20, 24 and 48 h of treatment, hydroxydihydrocarvone was the least toxic compound, with LC_ (50) = 168.86, 124.74, 80.84 and 23.46 mg / (50) values ​​of 1 938.92,1 172.18 and 401.03 mg / L, respectively.Conclusions: The data obtained in this study suggest that all evaluated monoterpenes, especially (-) - perillyl alcohol, have remarkable larvicidal effects and may be considered as potential sources for the development of suitable natural larvicides for mosquito management programs. Future small-scale field trials should be conducted.
其他文献
  主要介绍西安光机所在微结构聚合物光纤技术领域取得的最新研究进展.其中包括光纤预制棒规模化制造技术、大尺寸预制棒拉丝技术、孔洞修饰型微结构光纤、微结构光纤面板
会议
随着信息时代的到来,以微学习、微课程为标志的学习变革正成为一种新潮流越来越受到广大师生的欢迎.微课的制作,从构思、设计到最终完成,需要教师付出大量的心血和汗水.在这
  实时可靠的基本交通车辆信息是判断交通状况的根本依据,是实现高速公路智能化管理的前提,对于普及交通信息服务,保障高速公路行车安全,实现经济、高效、安全和便捷的运输服务
会议
改革开放20年以来 ,我国在利用外资方面取得了举世瞩目的骄人成绩。特别是近几年来 ,我国吸收的外商直接投资已经占全球国际直接投资的10 %左右 ,占发展中国家吸收的国际直接投资
在高速公路实际前期建设和后期运行的整个过程中,机电系统设备安装是至关重要的环节.高水平的设备安装和施工管理一方面可以确保高速公路运行的安全性,另一方面可以提高其稳
008895——--pe-tAIWty--W——————;VU民瓦民1瓦;;。?厂。 _,。_:C‘e~ —、*》 ﹂ 一天(三联油画)@陈钟柱 008895 ---- pe-tAIWty - W ------; VU Min Wumin 1 watt ;;
期刊
︶j/a︵一————--pe-tAIWty--W——————;VU民瓦民1瓦;;。?厂。 _,。_:C‘e~ —、*》 ﹂ 教室系列之三(油画)@周秋雁 ) J / a (one - ---- pe-tAIWty - W ------; VU Min
期刊
智慧,是人类完善自我,发展自我,推动社会历史前进的动力之一。五千年来,大凡中国的军事家都推崇计谋取胜,以少胜多,四两拨千斤,用兵真如神,赢得了一场又一场战争的胜利。田
用法律手段推动个人购买住房 1989年东西德合并后,中央政府采取强硬措施,以法律形式确定了居民对住房的“购买权”。原东德把西德颁布的《建设法》、《财产法》、《住房法》