Eficácia do óleo de citronela [Cymbopogon nardus (L.) Rendle] no controle de ectoparasitas de bovinos

摘要: This study aimed to evaluate the in vivo effect of citronella oil on control bovine ticks [Rhipicephalus (Boophilus) microplus], horn flies (Haematobia irritans), stable (Stomoxys calcitrans) and houseflies (Musca domestica). Fifteen Holstein cows were allocated three groups five animals each. The treatments were: negative control, amitraz at 0.025% 4%. Engorged female counted before (mean days -3, -2, -1) 7, 14, 21 28 after treatment; blood samples also collected. Within days, phytotherapic agent had be reapplied tick infestation. relationship among number applications was 1:2.5 for oil, respectively. efficacy was, average, 71.8 30.9% 4% respectively, post-treatment. Lower observed group. There no difference parameters.