Efeito da cipermetrina e do amitraz em fêmeas ingurgitadas de Rhipicephalus (Boophilus) microplusno Semiárido Paraibano.

Abstract

Ticks are present in almost all Brazilian territory, and there are several species of ticks,including the Rhipicephalus (Boophilus) microplus,which is a responsible formajoeconomicloss. Because of the inappropriate use of acaricides are these parasites becoming increasingly resistant, causing damage not only to animals but also to the environment. In this work we used the Amitraz, Cypermethrin and distilled water asa control, in groups formed by engorged female Rhipicephalus (Boophilus) microplusno, which were collected randomly in the semiarid region of the state of Paraíba. The effectiveness of the acaricides: Amitraz and Cypermethrin on females was analyzed by observing the following parameters: prelaying period (PPP), laying period (PP), egg production index(IPO), reproductive frequence index (IFR), reproductive efficiency index(IER), product efficacy index(PEI), fertility index (FI) and it was also used according to mathematical formulasDrummond et al (1971). The analyzes were carried at the Parasitology Laboratory of the Academic Unit of Veterinary Medicine (UAMV) Health Center and Rural Technology (CSTR) at the Federal University of Campina Grande (UFCG). The results demonstrated a both the resistance of ticks Cypermethrinas to Amitraz, not reaching 95% efficiency.