Larvicidal activity of a few plant extracts against Culex quinquefasciatus and Anopheles stephensi
Pushpalatha, E.; Muthukrishnan, J.
Indian Journal of Malariology 32(1): 14-23
1995
ISSN/ISBN: 0367-8326 PMID: 8549835 Document Number: 453116
Larvicidal activity of partially purified extracts of leaves of Vitex negundo, Nerium oleander and seeds of Syzygium jambotanum on different instars of Culex quinquefasciatus and Anopheles stephensi was estimated. Petroleum ether (PE) : Ethyl acetate (EA) 3:1 fraction of V. negundo, 1:1 fractions of N. oleander and S. jambolanum inflicted considerable larval mortality and interfered with pupal-adult metamorphosis. At very low concentration the active fractions of these plant extracts extended the duration of the various larval instars and of pupation, In general, I and II instar larvae were more susceptible to the active fractions. Species and stage specific differences in the susceptibility of the mosquitoes to the active fractions of the plant extracts were observed.