title: Evaluation of the impact of Bacillus thuringiensis serovar israelensis and Temephos, used for the control of Simulium (Chirostilbia) pertinax Kollar, 1832 (Diptera, Simuliidae) on the associated entomofauna, Paraty, state of Rio de Janeiro, Brazil.
abstract: The study was set up to evaluate the impact of two commercial larvicide formulations, Bacillus thuringiensis serovar israelensis base (Bti) at 15 ppm/1 min and temephos at 0.03 ppm of active ingredient, used to control Simulium pertinax populations, on associated non-target entomofauna occupying the same breeding sites. The experiments were carried out on the Pedra Branca and Muricana rivers, on the slopes of Serra do Mar massif, municipality of Paraty, state of Rio de Janeiro, Brazil. Bti was applied to the river Pedra Branca and temephosto theriver Muricana. On both rivers, treatment and control sections were labeled as such, each one with two observation posts: slow moving water and fast water regions respectively. Artificial substrata was used to evaluate the abundance of associated entomofauna. Attached immature stages of arthropods were removed from both of its surfaces fortnightly. Were collected, from the two rivers, 28 477 specimens of the entomofauna associated with S. pertinax. The families Hydropsychidae, Chironomidae, Bactidae, Simuliidae, Blephariceridae and Megapodagrionidae were represented. These was an impact of temephos on the entomofauna associated with S. pertinax only in Simuliidae and Chironomidae, and to Bti only in Simuliidae. However, the reduction in their numbers was not statistically significant.
authors.affiliation: Superintendência de Controle de Endemias, 01027-000, São Paulo, SP, Brasil. coutinho@ioc.fiocruz.br
authors.forename: Carlos José Pereira da Cunha
authors.initials: CJ
authors.lastname: de Araújo-Coutinho
authors.forename: Andrea de Barros Pinto Viviani
authors.initials: Ade B
authors.lastname: Cunha
authors.forename: Nicolau Maués
authors.initials: NM
authors.lastname: Serra-Freire
authors.forename: Rubens Pinto
authors.initials: RP
authors.lastname: de Mello
mesh_terms: D000818:Animals; D001181:Arthropods / Q000187:drug effects*; D001413:Bacillus thuringiensis; D001938:Brazil; D004784:Environmental Monitoring; D006863:Hydrogen-Ion Concentration; D007306:Insecticides; D007814:Larva; D009032:Mosquito Control / Q000379:methods; D011156:Population Density; D012843:Simuliidae / Q000187:drug effects; D000002:Temefos; D013696:Temperature; D014872:Water Movements; D014874:Water Pollutants, Chemical
chemical_list: D007306:Insecticides; D014874:Water Pollutants, Chemical; D000002:Temefos