Characterization of permethrin-resistant Boophilus microplus (Acari: Ixodidae) collected from the state of Coahuila, Mexico.
نویسندگان
چکیده
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.
منابع مشابه
Isolation and identification of an esterase from a Mexican strain of Boophilus microplus (Acari: Ixodidae).
A strain of Mexican Boophilus microplus (Cz) collected near Coatzacoalcos, Veracruz, Mexico, exhibits a moderate, but significant, level of permethrin resistance. Unlike other highly permethrin resistant strains, the Cz strain does not have a mutation within the sodium channel gene that results in target-site insensitivity. However, the Cz strain possesses a substantial increase in general and ...
متن کاملFirst report of permethrin-resistant Boophilus microplus (Acari: Ixodidae) collected within the United States.
Boophilus microplus (Canestrini) (Acari: Ixodidae), collected in Hidalgo County, TX, were determined to be resistant to permethrin. Discriminating dose (DD) tests at the LC99 and 2X the LC99 of susceptible ticks yielded lower than expected mortalities for permethrin but not for coumaphos or amitraz acaricides. Initial bioassay results confirmed the pyrethroid resistance detected in the DD assay...
متن کاملAcaricide resistance and synergism between permethrin and amitraz against susceptible and resistant strains of Boophilus microplus (Acari: Ixodidae).
The control of the southern cattle tick, Boophilus microplus (Canestrini), in Mexico and many other countries relies on chemical acaricides. Boophilus microplus has developed resistance to all major classes of acaricides in recent years. To gain a better understanding of the resistance and to develop resistance management strategies that benefit both Mexican ranchers and USDA's cattle fever tic...
متن کاملIn Vivo and in Vitro Evaluation of Permethrin, Cypermethrin or Zeta-Cypermethrin Mixed with Plant Extracts against Susceptible and Resistant (San Alfonso) Rhipicephalus (Boophilus) microplus (Acari: Ixodidae) Strains
Acaricide resistance is a major problem that hinders the control of the cattle tick Rhipicephalus (Boophilus) microplus in Mexico. Permethrin (P), cypermethrin (C) and zeta-cypermethrin (Z) have been used to control R. (B.) microplus, and tick populations have developed resistance to these acaricides. The aim of the present study was to evaluate the effectiveness of a mixture containing P, C, o...
متن کاملLaboratory evaluation of verbutin as a synergist of acaricides against larvae of Rhipicephalus (Boophilus) microplus (Acari: Ixodidae).
Synergistic effects of verbutin, a member of aryl alkynyl derivatives, to three commonly used acaricides were evaluated with the modified Food and Agricultural Organization Larval Packet Test (FAO-LPT) against both susceptible and resistant strains of the southern cattle tick, Rhipicephalus (Boophilus) microplus (Canestrini) (Acari: Ixodidae). These tick strains demonstrated various levels of r...
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ورودعنوان ژورنال:
- Journal of medical entomology
دوره 44 5 شماره
صفحات -
تاریخ انتشار 2007