In vitro acaricidal effect of Tropaeolum majus on the engorged female of Rhipicephalus microplus

The aim of this study was to evaluate the in vitro acaricide effect of aqueous and ethanolic extracts of Tropaeolum majus on Rhipicephalus (Boophilus) microplus engorged females. Extracts from the aerial parts (stems and leaves) and from the flowers were tested at a final concentration of 2%. The Rhipicephalus (Boophilus) microplus engorged females were collected in farms in two municipalities (Sao Francisco de Assis and Sao Pedro do Sul), in Rio Grande do Sul state, Brazil. An efficacy of 99,1% was found using extract of aerial parts in ethanol at 70%. This is the first report of acaricidal effect of Tropaeolum majus. Key words: Resistance, Rhipicephalus (Boophilus) microplus, Medicinal plants, Tropaeolum majus, Tropaeolaceae, Capuchinha. O objetivo desse estudo foi o de avaliar a eficacia acaricida in vitro do extrato aquoso e etanolico a 70% da Tropaeolum majus em teleoginas do Rhipicephalus (Boophilus) microplus. Extrato das partes aereas (caule e folhas) e de flores foram testados na concentracao final de 2%. A coleta de teleoginas de Rhipicephalus (Boophilus) microplus foi realizada em propriedades do municipio de Sao Francisco de Assis e Sao Pedro do Sul, Rio Grande do Sul, Brasil. O extrato das partes aereas em etanol a 70% alcancou eficacia de 99,1%. Esse estudo e o primeiro relato de acao carrapaticida de Tropaeolum majus. Palavras-chave: Resistencia, Rhipicephalus (Boophilus) microplus, Plantas medicinais, Tropaeolum majus, Tropaeolaceae, Capuchinha