Estudo in vitro da resistência de Boophilus Microplus a carrapaticidas na pecuária leiteira do Norte do estado do Paraná

Luiz Sergio Merlini; Milton Hissashi Yamamura

doi:10.5433/1679-0359.1998v19n1p38

In vitro study of the resistance of Boophilus microplusto acaricides on dairy cattle production from north region of Parana state

Authors

Luiz Sergio Merlini Universidade Paranaense
Milton Hissashi Yamamura Universidade Estadual de Londrina

DOI:

https://doi.org/10.5433/1679-0359.1998v19n1p38

Keywords:

Boophilus microplus, Dairy cattle, Chemical resistance.

Abstract

From twenty five farms located in the north region of Parana state, Brazil, samples of Boophilus microplus engorged females were collected directly from naturally infested cattle and submitted to in vitro tests to verify their susceptibility to acaricides organophosphorous (triclorfon + coumaphos), amidine (amitraz) and pyretroids (deltamethina), acaricides commonly used by breeders to control Boophilus microplus were evaluated. From the data obtained in this work, it was verified that deltamethrina, amitraz and triclorfon + coumaphos have an action over engorged females mortality of 52,8%, 72,4% and 43,6 respectively. On the test of egg eclosion in percentage, deltamethrina presented 17,6%, amitraz 1,8% and triclorfon + coumaphos 15,24%. As the efficacy of the product, the results were deltamethrina 74,58%, amitraz 93,51 % and triclorfon + coumaphos 82,84%.

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Author Biographies

Luiz Sergio Merlini, Universidade Paranaense

Departamento de Medicina Veterinária - Universidade Paranaense - UNIPAR - Caixa Postal 106, Umuarama, PR. 87502-970.

Milton Hissashi Yamamura, Universidade Estadual de Londrina

Departamento de Medicina Veterinária Preventiva/CCA - Universidade Estadual de Londrina - UEL, Caixa Postal 6001, Londrina, PR. -86051-970.

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Published

2009-01-29

How to Cite

Merlini, L. S., & Yamamura, M. H. (2009). In vitro study of the resistance of Boophilus microplusto acaricides on dairy cattle production from north region of Parana state. Semina: Ciências Agrárias, 19(1), 38–44. https://doi.org/10.5433/1679-0359.1998v19n1p38

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Issue

Vol. 19 No. 1 (1998)

Section

Articles

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