Effecacy of the association of cipermetrin, chlorpyriphos, piperonyl butoxide and fluazuron against haematobia irritans in naturally infested cattle

  • Diefrey Ribeiro Campos
  • Barbara Rauta de Avelar
  • Gabriela Ferreira de Oliveira
  • Mariana Silva Revoredo Alves
  • Raphael Comissário Melo
  • Monique Taveira Medeiros
  • Katherina Comendouros
  • Fabio Barbour Scott
Keywords: control, horn fly, pyrethroid, organosphosphorous


Haematobia irritans is a fly of great importance in cattle breeding. It is responsible for causing chronic stress due to discomfort and leading to reduced meat and milk production and depreciation of leather. They are also responsible for transmitting viruses, bacteria and facilitating the development of myiasis. The objective of this study was to evaluate the efficacy of a product ectoparasiticide containing a association of cypermethrin, chlorpyrifos, butoxide pireronila and fluazuron in formulating "pour on" the fly control H. irritans in cattle naturally infested. Were used thirty crossbred cattle, regardless of sex or age. All animals included in the study had at least 50 naturally occurring adult H. irritans flies. The animals in the treated group were medicated with the combination of cypermethrin (5mg / kg), chlorpyrifos (7mg / kg), pireronyl butoxide (5mg / kg) and fluazuron (2.5mg / kg) at a dose of 1ml for every 10 kg live weight, "pour on" in single-dose. Efficacy was evaluated one, three, seven, 14 and 21 days after treatment, from the adult flies count on the animals of the two groups. The efficacy of the association tested in this study was 98.65%; 96.69%; 92.01%; 87.79% and 76.43% on days +1, +3, +7, +14 and +21 respectively. The association of cypermethrin, chlorpyrifos, pyreronyl butoxide and fluazuron in the pour-on formulation is effective in controlling H. irritans in naturally infested cattle

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