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Mechanism of resistance to synthetic pyrethroids in buffalo flies in south‐east Queensland
Author(s) -
Rothwell JT,
Morgan JAT,
James PJ,
Brown GW,
Guerrero FD,
Jorgensen WK
Publication year - 2011
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/j.1751-0813.2010.00685.x
Subject(s) - biology , locus (genetics) , fenvalerate , allele , genetics , insecticide resistance , zoology , resistance (ecology) , veterinary medicine , gene , pesticide , toxicology , ecology , medicine
Resistance to synthetic pyrethroids (SP) was first recorded in buffalo flies in Australia in 1980, associated with previous use of DDT and fenvalerate. By the 1990s, resistance was widespread. Resistance to SP in the related horn fly of the Americas is associated with kdr and super‐kdr mutations in a gene encoding for a voltage‐gated sodium channel. We describe 7–20‐fold resistance to SP in buffalo flies from south‐east Queensland, present evidence of flies that are heterozygous resistant at the kdr locus and show an increase in the frequency of the resistant allele 1 month after treatment of cattle with SP.