Tagetes erecta *** its mosquitocidal potency against Culex quinquefasciatus

作     者：Farjana Nikkon M Rowshanul Habib Zahangir Alam Saud M Rezaul Karim 

作者机构：Department of Biochemistry and Molecular BiologyRajshahi University 

出 版 物：《Asian Pacific Journal of Tropical Biomedicine》 (亚太热带生物医学杂志（英文版）)

年 卷 期：2011年第1卷第3期

页      面：186-188页

学科分类：090403[农学-农药学(可授农学、理学学位）] 09[农学] 0904[农学-植物保护] 

基　　金：Supported by a grant from Ministry of Science and Technology Bangladesh(No.BPROM/SHA-9/B-ANI-PRO/2009/324) 

主　　题：Tagetes erecta Linn. Culex quinquefasciatus Say Mosquitocidal Larvae Larvicidal effect Toxicity 

摘      要：Objective:To investigate mosquitocidal effects of ethanolic extract of(lowers of Tagetes erecta(***) and its chloroform and petroleum ether soluble fractions against the larvae of Culex quinquefasciatus(***).Methods:The fresh flowers of *** were extracted in cold with ethanol(5.0 L) and after concentration,the ethanol extract was fractionated with chloroform and petroleum ether to afford a brownish syrupy suspension of ethanol extract(50.0 g),petroleum ether soluble fraction(18.6 g) and chloroform soluble fraction(23.8 g).The larvicidal effect of ethanol extract and their solvent fractions were determined by the standard procedure of WHO against different instars of ***:Among the tested samples the chloroform soluble fractions showed the highest toxicity and consequently,the lowest LC_(50) values(14.14 μ g/mL,17.06 μ g/mL.36.88 μ g/mL and 75.48 μ g/mL) for all the instars larvae of *** larvae showed comparative tolerance in the course of increasing age and ***:It can be concluded that the flowers of *** are very effective natural larvicide and could be useful against ***.