title: [Focal and total residual insecticide spraying to control Triatoma brasiliensis and Triatoma pseudomaculata in Northeast Brazil].
abstract: To efficiently control the triatomines Triatoma brasiliensis and Triatoma pseudomaculata, a field trial was performed to compare conventional versus focal spraying of deltamethrin 5% SC at 25 mg a. i./m2 and the slow-release organophosphate malathion 8.3% SR at 2g a. i./m2. The assay took place in the county of Boa Viagem, Ceará State, with 1541 households, randomly separated into 4 groups. Two of them received focal spraying: PT, treated with deltamethrin indoors and in the peridomicile, and PL, which received slow-release malathion in the same circumstances. The other groups received conventional, i.e., total application: PT with deltamethrin in the intra- and peridomicile, and PL, which was treated with deltamethrin indoors and slow-release malathion in the peridomicile. Entomological surveys at 6 and 12 months post-treatment showed better results for mixed treatment, the PL group, probably due to good indoor performance for the pyrethroid and better performance of the slow-release formulation under the hostile peridomiciliary conditions. Domestic animal shelters underwent numerous modifications over the course of the year, fostering reduced insecticide performance in the peridomicile.
authors: Núcleo de Pesquisas de Produtos Naturais, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-590, Brasil.
authors: A M
authors: AM
authors: Oliveira Filho
authors: M T
authors: MT
authors: Melo
authors: C E
authors: CE
authors: Santos
authors: O F
authors: OF
authors: Faria Filho
authors: F C
authors: FC
authors: Carneiro
authors: J W
authors: JW
authors: Oliveira-Lima
authors: J B
authors: JB
authors: Vieira
authors: F V
authors: FV
authors: Gadelha
authors: J
authors: J
authors: Ishihata
mesh_terms: D000818:Animals; D001938:Brazil; D014355:Chagas Disease / Q000517:prevention & control; D006798:Housing; D006801:Humans; D007300:Insect Control / Q000379:methods*; D007303:Insect Vectors / Q000187:drug effects*; D007306:Insecticides; D008294:Malathion; D009570:Nitriles; D011722:Pyrethrins; D014224:Triatoma
chemical_list: D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; C017180:decamethrin; D008294:Malathion