Characterization of Permethrin-Resistant Boophilus microplus (Acari: Ixodidae) Collected from the State of Coahuila, Mexico

Robert J. Miller; Jesus A. Esparza Rentaria; Humberto Quiroz Martinez; John E. George

doi:10.1603/0022-2585(2007)44[895:COPBMA]2.0.CO;2

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Robert J. Miller,^* Jesus A. Esparza Rentaria,^** Humberto Quiroz Martinez,^** John E. George^***

^* Corresponding author, e-mail: robert.miller@ars.usda.gov.
^**Universidad Autónoma de Nuevo León Facultad de Ciencias Biologicas, Laboratorio de Entomología, Cd Universitaria San Nicolas de Los Garza, N.L., C.P. 66450 AARTADO POSTAL 105-F.
^***USDA–ARS, Knipling–Bushland U.S. Livestock Insects Laboratory, 2700 Fredericksburg Rd., Kerrville, TX 78028.

Abstract

Southern cattle ticks, Boophilus microplus (Canestrini) (Acari: Ixodidae), collected in Coahuila, Mexico, were determined to be resistant to permethrin. Discriminating concentration (DC) tests at the LC₉₉ and 2X the LC₉₉ of susceptible ticks produced 0 and 0.5% mortality, respectively, for permethrin. However, measured mortalities for coumaphos and amitraz acaricides were within the expected ranges. Polymerase chain reaction analysis of this strain detected a 99% frequency of homozygous resistant individuals in this strain.

Citation Download Citation

Robert J. Miller, Jesus A. Esparza Rentaria, Humberto Quiroz Martinez, and John E. George "Characterization of Permethrin-Resistant Boophilus microplus (Acari: Ixodidae) Collected from the State of Coahuila, Mexico," Journal of Medical Entomology 44(5), 895-897, (1 September 2007). https://doi.org/10.1603/0022-2585(2007)44[895:COPBMA]2.0.CO;2

Received: 28 November 2006; Accepted: 30 April 2007; Published: 1 September 2007