Acaricidal activity of essential oil of Syzygium aromaticum, hydrolate and eugenol formulated or free on larvae and engorged females of Rhipicephalus microplus

作者：Ferreira F M; Delmonte C C; Novato T L P; Monteiro C M O; Daemon E; Vilela F M P^*; Amaral M P H

来源：Medical and Veterinary Entomology, 2018, 32(1): 41-47.

DOI：10.1111/mve.12259

• Cattle tick
• clove
• medicinal plants
• phenylpropanoid

The cattle tick, Rhipicephalus microplus (Canestrini, 1888) (Ixodida: Ixodidae), is the most important ectoparasite in cattle-breeding areas and is responsible for severe economic losses. Synthetic acaricides have been used to control this parasite. However, the need for safer products has stimulated the search for new acaricides, such as those to be obtained from medicinal plants. The essential oil of Syzygium aromaticum (clove) has many biological properties and shows great potential for use in veterinary applications. In the context of the need for new agents, this study investigated the in vitro properties of the hydrolate, essential oil and the main constituent of S.aromaticum, eugenol, in formulated and free applications against larvae and females of R.microplus. Eugenol and the essential oil caused 100% mortality in larvae at starting applications of 2.5mg/mL and 5.0mg/mL, respectively. The hydrolate showed no activity. Both eugenol and essential oil had good efficacy in adult immersion tests at 50mg/mL and achieved 100% efficacy at a concentration of 100mg/mL. The results of these tests reaffirm the important potential of clove essential oil and eugenol.

• 出版日期2018-3