Effect of some plant extracts on the first and second larval instar of Culex pipines pipines L

The present study aimed to some alternatives chemicalpesticides and observation their effect on the life of first secondlarva instar Culex pipiens L. for this reason, species ofmosquitoes was raised in breeding cage, which locally produced.The plant extracts seeds Nigella sativa, Azadirachta indica,Sesbania sesban Lagenaria vulgaris, larvae andsecond mosquitoes were treated with byconcentrations 100, 500, 1000, 5000, ppm. showed differentresults according concentration duration treatment. Thetreatment that sativa seed extractis higher than rest extracts. mortality percentage was93.3% 5000 ppm after 24 hours treatment.Themortality same extract 100% at concentrationof within 48 treatment larval instar, whilethe 5000ppmconcentration during second