In a four year survey 253 isolates of Boophilus decoloratus from the Republic of South Africa and Transkei were tested in the laboratory for their susceptibility to certain organophosphorus ixodicides. Fifty-seven of these isolates were susceptible to organophosphorus compounds, 88 isolates showed a range of susceptibility between that of the susceptible laboratory strain and a strain having a resistance greater than that for the Berlin type strain. A field trial confirmed degrees of resistance shown in the laboratory to the organophosphorus ixodicides benoxophos, chlorfenvinphos, dioxathion, dicrotophos, quintiofos and chlorfenvinphos/dioxathion.
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[In Vitro efficacy of comercial formulations of ixocidides in engorged female of Boophilus microplus collected of dairy cattle at Paraíba Valey in the state of São Paulo].
Rev Bras Parasitol Vet
December 2006
Agência Paulista de Tecnologia dos Agronegócios, Pólo Regional de Desenvolvimento Tecnológico dos Agronegócios do Vale do Paraíba, Caixa Postal 07, Pindamonhangaba, SP, 12411010, Brasil.
Laboratory trials were realized between the year 2001 at 2004 to evaluate the efficacy of commercial ixodicides against samples of Boophilus microplus collected of dairy bovines in 17 properties of eight cities at Paraíba Valey region, State of São Paulo Brazil. The trials was performed against engorged female using immersion technique. It was evidenced low efficacy of products of the chemical groups synthetic pyrethroid (28.
View Article and Find Full Text PDFA strain of Boophilus decoloratus, resistant to fenvalerate, was subjected to larval immersion, adult immersion and stall tests using the following classes of ixodicides: organochlorines, organophosphates, a diamidide and pyrethroids. A susceptible reference strain of B. decoloratus was used for comparative purposes.
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