In vitro assays of some ixodicides against a cattle tick Boophilus microplus (Canestrini, 1867) strain from Jacarel, São Paulo State, Brazil

Abstract

By means of ‘in vitro’ immersion tests for engorged female ticks (Drummond test), used for estimation of the efficacy of ixodicides, we purposed to measure the acaricide susceptibility of a Boophilus microplus strain from Jacarei, São Paulo State Brazil, including subject in the test some of the commonest ixodicides employed in the area, such as: 1) trichlorphon + coumaphos; 2) amitraz; 3) fenvalerate; 4) decametrin; 5) cypermethrin high cis + dichlorvos; 6) cypermethr in high cis. Of the six products, the highest activity in relation to the control percentage was performed by cypermethrin high cis + dichlorvos, becoming evident its high ovariostatic and antiembryogenic efficiency, as well as suggesting that it could be one of the most effective for the control of B.microplus in the area.