With the objective of studying aspects of the infestation of the mosquito Culex quinquefasciatus in the Pinheiros river, in the city of São Paulo, SP, Brazil, and to evaluate the effectiveness of the control applications made in the place, activities of collecting mosquitoes were performed in ten sites located along the two margins of the river. The mosquitoes were collected by aspiration method, during the period of one year. After that, they were sent to the laboratory for identification, scoring and treatment of the frequency data comparing with the applications data of chemical and biological control strategies. The control applications had presented partial effect in the population frequency of the species, what opens for a discussion about the peculiarities of the breeding sites, as possible barriers in the efficiency of the products applied in the aquatic environment and in the border vegetation, along the course of the river.
Control; insecticides; larvae control
