Abstract

The present study aimed to study some alternatives chemical pesticides and observation their effect on the life of the first and second larva instar of Culex pipiens pipiens L. for this reason, this species of mosquitoes was raised in the breeding cage, which was locally produced. The plant extracts of the seeds of the Nigella sativa, Azadirachta indica, Sesbania sesban and Lagenaria vulgaris, the larvae of the first and second instar of mosquitoes were treated with plant extracts by concentrations of 100, 500, 1000, 5000, ppm. The study showed different results according to the concentration and duration of treatment. The treatment with plant extracts showed that the Nigella sativa seed extract is higher than the rest of the plant extracts. The mortality percentage was 93.3% in the concentration of 5000 ppm after 24 hours of treatment.The mortality percentage for the same extract was 100% at the concentration of 5000 ppm within 48 hours of treatment for the first larval instar, while the mortality percentage for the extract were 100% at 5000ppm concentration during 24 and 48 hours of treatment for the second larval phase.While the Lagenaria vulgaris seed extract was the least affected from the rest of the extracts on the larvae, where the mortality percentage 26.66, 33.33% in the concentration of 5000 ppm percentage 24, 48 hours of treatment respectively for the first larval instar. For the second larvae, the results were 50% and 86.66% at 5000 ppm concentration after 24, 48 hours of treatment respectively for extract of pumpkin plant.

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The article was added to IASJ on 2018-12-20

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