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Efficacy of citronella [Cymbopogon nardus (L.) Rendle] oil in the control of bovine ectoparasites

C.A. Agnolin C.J. Olivo M.L.R. Leal R.C.R. Beck G.R. Meinerz C.L.C. Parra P.R. Machado V. Foletto C.M. Bem P.R.S.J. Nicolodi About the authors

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

acaricide; dairy cattle; phytotherapic agent; essential oil

Sociedade Brasileira de Plantas Medicinais Sociedade Brasileira de Plantas Medicinais, Revista Brasileira de Plantas Medicinais, Universidade Estadual de Maringá, Departamento de Farmácia, Bloco T22, Avenida Colombo, 5790, 87020-900 - Maringá - PR, Tel: +55-44-3011-4627 - Botucatu - SP - Brazil