Susceptibility of Haematobia irritans (Diptera: Muscidae) to permethrin in dairies in Aguascalientes, Mexico.
The purpose of this study was to conduct a survey for the susceptibility of the horn fly, Hematobia irritans (L.), populations to permethrin on dairy cattle from Aguascalientes, Mexico. Samples of populations of horn flies at 25 dairies were exposed to two discriminating doses (2.5 and 6.0 microg/cm2) on permethrin-treated filter papers and the percentage of mortality was compared with that of a susceptible strain treated with same doses of permethrin. The results show that there was a difference in the mortality from two discriminating doses and the mortality of the susceptible strain. Therefore, horn fly populations at all dairies tested in Aguascalientes, Mexico, were susceptible to permethrin. This insecticide, as well as other pyrethroids, could continue to be used to provide satisfactory control of horn flies in the study region.
Cruz-Vázquez
Carlos
C
Instituto Tecnologico Agropecuario de Aguascalientes, AP 74-2, Admon, Postal No. 2, CP 20041, Aguascalientes, Ags, Mexico.
Altamira
Guicelda
G
Ramos
Miguel
M
Medina
Leticia
L
Garcia-Vazquez
Zeferino
Z
George
John
J
D000818:Animals; D003612:Dairying; D007306:Insecticides / Q000633:toxicity*; D008800:Mexico; D009117:Muscidae / Q000187:drug effects*; D026023:Permethrin / Q000633:toxicity*; D010572:Pest Control, Biological
D007306:Insecticides; D026023:Permethrin