| || Botanicals as Mosquito Larvicides
Author : Nath, D. R.;Bhuyan, M.;Goswami, S.
Source : Defence Science Journal ; Vol:56(4) ; 2006 ; pp 507-511
Subject : 57.089 Biomedical Sciences
Keywords : Mosquito larvicide;Plant extract;Larvicidal activity ;Zanthoxylum limonella;Piper nigrum;Calotropis gigantea;Aedes(s) albopictus;Culex quinquefasciatus
Abstract : Methanol extracts of 19 indigenous plants were evaluated as mosquito larvicide. Among these, pericarp of Zanthoxylum limonella was found to have the most promising larvicidal properties against Aedes(s) albopictus and Culex quinquefasciatus with LC90 values at 0.47 ppm and 0.73 ppm, respectively. The extract of Piper nigrum was also found very effective (LC90) on the larvae of both the species at 6.8 ppm and 8.4 ppm, respectively. The extracts of the remaining plant parts showed LC90 values at above 100 ppm concentration. Extract of Calotropis gigantea was found to be the least effective ( LC90 values at 962.8 ppm and 1091.8 ppm) against the larvae of both the species. However, plant extracts were found more effective against Aedes(s) albopictus larvae than against Culex quinquefasciatus larvae.