Larvicidal activity of plant extracts against Culex quinque-fasciatus say

Abstract

Petroleum ether extract (1000, 500, 250, 125 ppm) of Toddalia asiatica L., Aegle mermelos Corr., Murraya koengili Spreng., leaves and seed extracts of Alocasia indica Schott., were tested for their larvicidal activity on fourth instar larvae of Culex quinquefasciatus Say results showed that tested plant extracts possessed insecticidal activity. The synergetic effect of mixture of methanol extracts of T. asiatica seeds and the leaves of A. indica (1:1) at 10.265 ppm concentration showed larval mortality, pupal mortality, half ecdysed organisms, larval-pupal intermediates and colour changes during fourth instar stage. It is suggested that all the plants possess larvicidal properties that could be developed and used as natural insecticides for mosquito control. © JBiopest.