Lethal Effects of the Mix (Suneem 1% and Metarhizium anisopliae) on Two Instars Larvae of Culex quinquefasciatus (Diptera, Culicidae) (Say, 1823) in their Natural Sites

Mosquitoes in general and Culex quinquefasciatus in particular have for a long time been a source of nuisance due to diseases they transmit, punctures and annoying buzzes. They are also a public health problem. That is why this study aim to find a biopesticide that can fight effectively but also be an alternative to persistent chemical pesticides in the environment. Thus, we decided to control the mosquito larvae of Culex in the wild with biopesticides suneem1 % alone, Metarhizium anisopliae alone and their mixture. To arrive at this we determined the lodgings and determine their physicochemical conditions. We also evaluated larval densities before and after treatment with the ladle technique. This methodology allowed us to have results. The lodgings of Pikine, Kaffrine and Goudiry gave mortalities greater than 50 % in 2 days. Suneem alone, Metarhizium anisopliae alone gave mortalities, but the formulation of these two biopesticides is more effective with high mortalities in 2 days. These control stage 3 larvae of Culex quinquefasciatus are used for these two treatments and placed under the same treatment conditions. The number of dead quinquefasciatus culex larvae increases in all treatment houses as a function of time. In sum, Metarhizium anisopliae and Suneem 1 % are both effective against Culex quinquefasciatus stage 3 larvae. Their mixture caused a synergistic effect and thus increased their individual effectiveness.