Abstract

EFFICACY OF TERMINALIA BELLIRICA SEED EXTRACT FOR THE CONTROL OF FILARIAL VECTOR, CULEX QUINQUEFASCIATUS SAY

Sakkanan Ilango and Mariappan Malarvizhi

ABSTRACT

The larvicidal activity of seed extract of Terminalia bellirica, on the larvae of Culex quinquefasciatus was determined, Ethyl acetate (EtOAc) soluble extract of T. bellirica showed very high larvicidal activity than (MeOH) Methanol extract. Irrespective of the species of the mosquitoes tested, at concentrations ranging from 31.21 to 34.95 ppm of the active fraction killed 50% of the treated larvae. Exposure of the mosquitoes at any stage of their larval development less than 7.03ppm active seed extracts of T. bellirica inhibited 50% of the treated larvae from emerging as adults. The active extracts also interfered moulting and metamorphosis, induced malformation, extended the larval development duration and inhibited an adult emergence.

Keywords: mosquitoes, larvicidal activity, adult emergence and growth index.