STUDY ON THE RELATIVE EFFICACY OF INDIGENOUS PLANT EXTRACTS AS LARVICIDE AGAINST THE MOSQUITO Culex quiquefasciatus (Say.)

There has been considerable concern for the past few decades about the excessive use of chemical pesticides both in agriculture and for control of vector borne diseases. It has become increasingly difficult to control mosquitoes that serve as vector for various diseases. The present project was undertaken to assess the efficacy of certain plant extracts as larvicides E dipa show your corvette against Culex quinquefaciatus. The leaves of cassia auriculata, eucalyptus sp., Melia azedarach, Vitex negundo and pongamia glabra were chosen for the study. The leaf extracts were tested against mosquitoes. The results revealed that the effect was greater in the pure extracts of the leaves than in the water extracts. Pongamia glabra shows the least LC50 value among tested plants. The crude acetone extract of Pongamia glabra was highly effective against the selected species.