Autoria: HIGA, L. de O. S.; GARCIA, M. V.; BARROS, J. C.; KOLLER, W. W.; ANDREOTTI, R.

Resumo: The Rhipicephalus (Boophilus) microplus tick is responsible for considerable economic losses in Brazil, causing leather damage, weight loss and reduced milk production in cattle and results in the transmission of pathogens. Currently, the main method for controlling this tick is using acaricides, but their indiscriminate use is one of the major causes of resistance dissemination. In this study, the adult immersion test (AIT) was used to evaluate resistance in ticks from 28 properties located in five different states (Mato Grosso do Sul, Mato Grosso, Ceará, São Paulo, e Minas Gerais) and the Distrito Federal (DF) of Brazil. The resistance was found in 47.64% of the repetitions demonstrating an efficacy of less than 90% in various locations throughout the country. The larvae packet test was used to evaluate samples from ten properties in four states (Mato Grosso do Sul, Mato Grosso, Minas Gerais and Espírito Santo). Spray products belonging to the main classes of acaricides, including combination formulations, were used in both types of test. New cases of resistance were found on properties within the states of Ceará, Espírito Santo and Mato Grosso, where such resistance was not previously reported.

Ano de publicação: 2016

Tipo de publicação: Artigo de periódico

Unidade: Embrapa Gado de Corte

Palavras-chave: Acaricide resistance, Adult immersion test, Carrapato bovino, Larvae packet test, Resistência acaricida, Teste de imersão de adulto, Teste de pacote de larva, Ticks