Open AccessMosquito repellent properties of Delonix elata (L.) gamble (Family: Fabaceae) against filariasis vector, Culex quinquefasciatus Say. (Diptera: Culicidae)
Author(s) -
Marimuthu Govindarajan
Publication year - 2014
Publication title -
asian pacific journal of tropical disease
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.208
H-Index - 33
ISSN - 2222-1808
DOI - 10.1016/s2222-1808(14)60438-2
Subject(s) - culex quinquefasciatus , filariasis , traditional medicine , biology , vector (molecular biology) , mosquito control , botany , veterinary medicine , medicine , larva , aedes aegypti , malaria , immunology , biochemistry , gene , helminths , recombinant dna
Objective: To determine the repellent activity of hexane, ethyl acetate, benzene, chloroform and\udmethanol extract of Delonix elata (D. elata) leaf and seed against Culex quinquefasciatus (Cx.\udquinquefasciatus).\udMethods: Evaluation was carried out in a net cage (45 cm伊30 cm伊25 cm) containing 100 blood\udstarved female mosquitoes of Cx. quinquefasciatus. Repellent activity was carried out in the\udlaboratory conditions according to the WHO 2009 protocol. Plant crude extracts of D. elata were\udapplied at 1.0, 2.5, and 5.0 mg/cm2 separately in the exposed fore arm of study subjects. Ethanol\udwas used as the sole control.\udResults: In this study, the applied plant crude extracts were observed to protect against mosquito\udbites. There were no allergic reactions experienced by the study subjects. The repellent activity of\udthe extract was dependent on the strength of the extract. Among the tested solvents, the leaf and\udseed methanol extract showed the maximum efficacy. The highest concentration of 5.0 mg/cm2\udprovided over 150 min and 120 min protection, respectively.\udConclusions: Crude extracts of D. elata exhibit the potential for controlling Cx. quinquefasciatus,\udthe mosquito vector of filariasis