Mosquito larvicidal and ovicidal properties of Eclipta alba (L.) Hassk (Asteraceae) against chikungu

来源 :亚太热带医药杂志(英文版) | 被引量 : 0次 | 上传用户:warewell
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: The present study deals with the investigation of larvicidal and ovicidal activities of benzene, hexane, ethyl acetate, methanol and chloroform leaf extract of Eclipta alba (E. alba) against dengue vector, Aedes aegypti (Ae. Aegypti). Methods: Twenty five early III instar larvae of Ae. aegypti was exposed to various concentrations (50-300 ppm) and was assayed in the laboratory by using the protocol of WHO 2005; the 24 h LC50 values of the E. alba leaf extract was determined by Probit analysis. For ovicidal activity, slightly modified method of Su and Mulla was performed. The ovicidal activity was determined against Ae. aegypti to various concentrations ranging from 100-350 ppm under the laboratory conditions. The egg hatch rates were assessed 48 h post treatment. Results: The LC50 values of benzene, hexane, ethyl acetate, methanol and chloroform extract of E. alba against early third instar larvae of Ae. aegypti were 151.38, 165.10, 154.88, 127.64 and 146.28 ppm, respectively. Maximum larvicidal activity was observed in the methanol extract followed by chloroform, benzene, ethyl acetate and hexane extract. No mortality was observed in control. Among five solvent tested the methanol extract was found to be most effective for ovicidal activity against Ae. aegypti. The methanol extracts exerted 100% mortality (zero hatchability) at 300 ppm. Conclusions: From the results it can be concluded the crude extract of E. alba was an excellent potential for controlling Ae. aegypti mosquito.
其他文献
AIM: To assess the effects of poor nutritional and psychological status on tolerance of cancer treatment and the recovery of physical performance status in pati
目的 研究术前呼吸道护理管理对冠脉搭桥患者围术期的影响.方法 选取我院2016年10月-2018年10月收治的92例拟进行冠脉手术的病人作为研究对象,随机分为术前+术后康复组(A组=4
我国结直肠癌发病率及病死率逐年上升,而近年提出的"精准医学"对探究结直肠癌的发生、发展、诊断、治疗、预后评估均有重大意义。在分子分型的基础下,以循环肿瘤DNA基因测序进行诊断,来指导临床治疗及对患者预后进行评估。但目前仍缺少中国人种的大数据研究,我们需要建立自己的基因数据库,从而制定真正的个体化治疗方案。
期刊
1995年1月至1999年12月,我们用改进的方法对48例动脉导管未闭(PDA)施行手术。 全组男20例,女28例。年龄3.5~20岁。胸骨左缘第二肋间可扪及连续性震颤,闻及连续性 机器样杂音,心功
期刊
晕厥指突然发作的短暂的意识丧失,同时伴有肌张力的降低或消失,持续几秒至几分钟自行恢复,其实质是脑血流量的暂时减少.rn晕厥可由心血管疾病、神经系统疾病及代谢性疾病等引
期刊
由于社会的发展和需求,我国急诊急救事业开始兴起并快速发展,各个医院开始成立内科急诊急救部门,并且逐渐对其内部体系进行完善.由于急诊急救是一项重要的医疗措施,不仅需要
AIM: To determine the accuracy of high-resolution magnetic resonance imaging (MRI) using phased-array coil for preoperative assessment of T staging and mesorect