[Focal and total residual insecticide spraying to control Triatoma brasiliensis and Triatoma pseudomaculata in Northeast Brazil].
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.
Oliveira Filho
A M
AM
Núcleo de Pesquisas de Produtos Naturais, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, 21941-590, Brasil.
Melo
M T
MT
Santos
C E
CE
Faria Filho
O F
OF
Carneiro
F C
FC
Oliveira-Lima
J W
JW
Vieira
J B
JB
Gadelha
F V
FV
Ishihata
J
J
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
D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; C017180:decamethrin; D008294:Malathion