PMID: 752081Dec 1, 1978Paper

The current status of resistance to organophosphorus ixodicides by the blue tick, Boophilus Decoloratus (Koch) in the Republic of South Africa and Transkei

Journal of the South African Veterinary Association
J A BakerR J Taylor

Abstract

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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