Resistance to synthetic pyrethroids in a DDT‐resistant strain of <i>Boophilus microplus</i>

Nolan, Justin M.; Roulston, W. J.; Wharton, R. H.

doi:10.1002/ps.2780080508

Cited by 47 publications

(10 citation statements)

References 7 publications

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“…The relative toxicity values of common pyrethroids for taiga ticks were very close to the data obtained by Nolan et al (1977) for the tick Boophilus microplus ( Table 2). The structure-toxicity relationship for ticks is in general agreement with that for other bloodsucking arthropods.…”

Section: Discussionsupporting

confidence: 69%

“…Many of them have proven to be effective acaricidcs (Ahrens et al, 1988;Hamel, 1987;Heller-Haupt and Varma, 1982;Muenstermann et at., 1988: Nolan et al, 1977Potier, 1991;Stendel, 1988;Schnitzeling et al, 1989). The treatment of clothing with permethrin is a method of personal protection against ticks (Lane, 1989;Lane and Anderson, 1984: Mount and Shoddy, 1983: Schreck et at., 19801982a,b).…”

Section: Introductionmentioning

confidence: 99%

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Susceptibility of the taiga tick Ixodes persulcatus Schulze to pyrethroids

et al. 1994

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The susceptibility of the taiga tick Ixodes persulcatus Schulze to 15 pyrethroids has been evaluated. The knockdown time after exposure of ticks to pyrethroids tested was quite similar. It was revealed that the lethal doses of type I pyrethroids (permethrin-like) induced the rapid attachment of ticks to host. In contrast, the fatal poisoning with type II pyrethroids (alpha-CN-pyrethroids) made the ticks unable to attach completely. Possible mechanisms of the acceleration and the prevention of attachment are discussed.

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Section: Discussionsupporting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Susceptibility of the taiga tick Ixodes persulcatus Schulze to pyrethroids

et al. 1994

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“…Three of the products analyzed had a mean efficiency lower than 95% (ectoparasiticides A, C, and D; Table 1). Reports of cattle tick resistance to SP and OP have been recorded for decades (NOLAN et al, 1977). An alternative measure to increase acaricide treatments efficacy against tick populations is the combination of two different chemicals.…”

Section: Resultsmentioning

confidence: 99%

Efficacy of commercial synthetic pyrethroids and organophosphates associations used to control Rhipicephalus (Boophilus) microplus in Southern Brazil

Reginato

Cadore

Menezes

et al. 2017

Rev. Bras. Parasitol. Vet.

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This study evaluated the acaricidal efficiency of synthetic pyrethroids (SP) associated with organophosphates (OP) against Rhipicephalus (Boophilus) microplus populations in the state of Rio Grande do Sul, Southern Brazil. Ticks were collected in 54 cattle farms and tested using in vitro adult immersion test against four commercially available acaricide mixtures of SP and OP. Only one of four acaricides, comprising a mixture of cypermethrin, chlorpyrifos, and fenthion, had a mean efficiency higher than 95%, and was effective in 94.44% (51/54) of the cattle farms tested. The acaricide with a mixture of cypermethrin, chlorpyrifos, and citronelall had the lowest mean efficiency (62.11%), and was effective in 29.62% (16/54) of cattle farms tested. Furthermore, R. (B.) microplus in Southern Brazil exhibited differing degrees of resistance to SP and OP mixtures. The results suggest that the presence of fenthion contributes to the higher efficiency of the formulation with this active principle. This is possibly due to its recent commercial availability, as tick populations have been lower challenged with this product. Monitoring the resistance of ticks to carrapaticides is essential to maximize the efficiency of these products in the control of R. (B.) microplus.Keywords: Tick, cattle, chemical control, resistance, Boophilus. ResumoEste estudo avaliou a eficiência acaricida de piretroides sintéticos (SP) associados a organofosforados (OP) sobre populações de Rhipicephalus (Boophilus) microplus no estado do Rio Grande do Sul, Brasil. Carrapatos foram coletados em 54 fazendas de bovinos, testados in vitro pelo teste de imersão de teleóginas, contra quatro associações acaricidas comercialmente disponíveis de SP e OP. Apenas um dos quatro acaricidas, constituído por associação de cipermetrina, clorpirifós e fenthion, teve eficiência média superior a 95%, sendo eficaz em 94,44% (51/54) das fazendas testadas. O acaricida com associação de cipermetrina, clorpirifós e citronelal teve menor eficiência média (62,11%), sendo efetivo em 29,62% (16/54) das fazendas testadas. Além disso, o R. (B.) microplus no sul do Brasil, apresentou diferentes graus de resistência às associações de SP e OP. Os resultados sugerem que a presença do fenthion contribui para a maior eficiência da formulação com esse princípio ativo. Possivelmente, isso ocorre em função da sua recente introdução no mercado, já que as populações de carrapatos foram pouco desafiadas com este produto. Monitorar a resistência dos carrapatos aos carrapaticidas é fundamental para maximizar a eficiência desses produtos no controle de R. (B.) microplus.

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“…The compared two compounds may have a synergistic effect, which may shorten mortality time. It was established that the compounds are potential pyrethroids [12] when used in combination mixtures for the control of cattle ticks. However, cypermethrin alone showed the shortest time to achieve 50% mortality, at 3.6 min at a 1.0 mg/mL concentration.…”

mentioning

confidence: 99%

Resistance and control of cypermethrin and chlorpyrifos as acaricide for control of hard tick Haemaphysalis longicornis (acari: ixodidae)

You¹

2014

Korean Journal of Veterinary Research

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: Chemotherapeutic treatment is still the foundation of tick control programs. This study investigated the acaricidal efficacy of cypermethrin alone and in combination with chlorpyrifos against Haemaphysalis (H.) longicornis. Unfed larval ticks were exposed to 0.1, 1.0, and 10 mg/mL cypermethrin for 60 min, after which the acaricidal efficacy was examined based on tick mortality. All compounds showed similar suppression curves, with the best control being achieved by cypermethrin and chlorpyrifos (1 : 1 ratio) at 10 mg/mL. Effective cypermethrin concentrations for tick control were two to seven times higher than the recommended doses, indicating resistance by H. longicornis.

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Resistance to synthetic pyrethroids in a DDT‐resistant strain of Boophilus microplus

Abstract: The susceptibility of a standard reference strain of the cattle tick Boophilus microplus, to a group of synthetic pyrethroids, has been compared with that of a DDT-resistant strain. Cross resistance has been demonstrated in laboratory and field tests.

Cited by 47 publications

References 7 publications

Susceptibility of the taiga tick Ixodes persulcatus Schulze to pyrethroids

Susceptibility of the taiga tick Ixodes persulcatus Schulze to pyrethroids

Efficacy of commercial synthetic pyrethroids and organophosphates associations used to control Rhipicephalus (Boophilus) microplus in Southern Brazil

Resistance and control of cypermethrin and chlorpyrifos as acaricide for control of hard tick Haemaphysalis longicornis (acari: ixodidae)

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