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Insecticide susceptibility of horn flies, Haematobia irritans (Diptera: Muscidae), in the State of Mato Grosso do Sul, Brazil. Repositório Alice
BARROS, A. T. M.; GOMES, A,; KOLLER, W. W..
Horn flies from wild populations were collected on cattle and exposed to filter papers impregnated with cypermethrin, permethrin, or diazinon and mortality was assessed after two hours. Resistance to cypermethrin was detected in all populations, with resistance ratios (RR) ranging from 27.6 to 91.3-fold. Permethrin bioassays provided apparently low levels of resistance (RR<5), however, resistant flies were found in 96.9% of the populations based on diagnostic concentrations. From both pyrethroid bioassays, resistance was detected in 97.4% of the populations. On the other hand, a high susceptibility to diazinon (RR d 1.1) was detected in all populations. Pyrethroid products, most cypermethrin (92.3%) and deltamethrin (66.7%), were used in all ranches...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Sanidade animal; Haematobia irritans; Mosca-do-chifre; Resistência a pesticida; Piretróide; Mato Grosso do Sul; Brasil; Animal health; Horn flies; Pesticide resistance; Pyrethroid; Organophosphate; Brazil.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/326335
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