Abstract

GONZALEZ VILLEGAS, Rebeca et al. Insecticidal effect of plant extracts on Culex tarsalis (Diptera: Culicidae) in laboratory. Rev. Mex. Cienc. Agríc [online]. 2013, vol.4, n.2, pp.273-284. ISSN 2007-0934.

Mosquitoes are worldwide pests, due to diseases transmitted to humans from mammals or birds that migrate from one place to another. Plant extracts promise to be an alternative because it does not cause side effects to the environment and humans. Therefore the objective of this study was, to determine the insecticidal effect of plant extracts on Culex tarsalis larvae in the laboratory. The work was developed in the laboratory of the University (UAAAN), where plant extracts (methanolic and hexanic) and the bioassays were performed. The concentrations tested were: 400, 500, 600, 700, 800, 900 and 1000 ppm and mortality were recorded at 24, 48 and 72 h after the application of treatments. The results were analyzed in the PC-Probit for LC₅₀. Seed extracts (Annona muricata, Carica papaya and Azadirachta indica) showed the best results by killing over 80% of the population after 24 h with 1000 ppm. Plant extracts of Annona muricata, Carica papaya and Azadirachta indica showed to be a good alternative for the control of Cx. tarsalis.

Keywords : guanabana; neem; papaya; methanol.

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