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The use of chemicals, in action against ectoparasites comes swelled in Brazil. The dependence of these brings various environmental impacts and a need for greater concentration of these products that can result in death to insect, mites or ticks. Within the planning alternative methods of control of arthropods, lichens are one of them. In order to evaluate the activity of the same, there was the extraction of active principles of lichens collected in the vicinity of the city of Imperatriz, Maranhão. Using organic reagents lichens extracts obtained for later use in arthropods. Three tests were conducted on the species of ticks Rhipicephalus sanguineus, Rhipicephalus (Boophilus) microplus and Anocentor sp. where they were subjected to immersion baths in lichens extracts solution and in control solution. According to the tests it was possible to observe that the liquênicos extracts surveyed had efficacy when used in cited species of ticks.

Obtenção de extratos liquênicos do Cerrado Maranhense para avaliação da atividade carrapaticida