In vivo effect of diflubenzuron, administered via mineral salt supplementation, against haematobia irritans and rhipicephalus microplus parasitizing cattle
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Data
2018-10-01
Autores
Cruz, Breno Cayeiro [UNESP]
Gomes, Lucas Vinicius Costa [UNESP]
Maciel, Willian Giquelin [UNESP]
Felippelli, Gustavo [UNESP]
Dos Santos, Isabella Barbosa [UNESP]
Cruvinel, Leonardo Bueno
Couto, Luiz Fellipe Monteiro
Bastos, Thiago Souza Azeredo
Cavalcante, Alliny Souza de Assis
Nicaretta, João Eduardo
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Resumo
This study involved two field trials with the aim of evaluating the efficacy of diflubenzuron, via mineral supplementation, against Haematobia irritans parasitizing cattle. Concomitantly with the main trial, a stall test was conducted to ascertain the effects of a different formulation with the same active ingredient against Rhipicephalus microplus, along with the action of diflubenzuron on the reproductive parameters of R. microplusfemales that had naturally detached from cattle. Against H. irritans, it was observed that the efficacy indexes fordiflubenzuron were low (≤ 31.3% or 44.6%) or null (0.0%) throughout the study. The anti-R. microplus efficacy of diflubenzuron, at weekly intervals, ranged from 0.0 to 13.7% over the entire experimental period. Null efficacy (0.0%) was registered for diflubenzuron in relation to the reproductive parameters of R. microplusfemales that had naturally detached from cattle. The different diflubenzuron formulations, administered via mineral salt supplementation, did not show satisfactory efficacy indexes against H. irritans and R. microplus parasitizing cattle, within the experimental design of the present study. In addition, this agent did not present any deleterious effects on the reproductive parameters of R. microplus females.
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Benzoylphenyl urea, Cattle, Chitin synthesis inhibitor, Engorged females, Reproductive parameters, Rhipicephalus microplus
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Revista Brasileira de Parasitologia Veterinaria, v. 27, n. 4, p. 545-554, 2018.