EFEITO ACARICIDA IN VITRO DE Schinus molle L. (AROEIRA-SALSA) SOBRE O CARRAPATO BOVINO, Rhipicephalus (Boophilus) microplus

Abstract

Rhipicephalus (Boophilus) microplus is the main ectoparasite of cattle in countries with tropical and subtropical climates and is a major obstacle to cattle. Producers, mostly combat this parasite just applying acaricides products by applying these synthetic products on animals. Because it is a toxic product, this action often performed incorrectly, has resulted in environmental contamination, residues in animal products and intoxication of the person who applies and, parasitic resistance development. The use of natural products has been considered an important alternative to control these parasites. In this context, this study aimed to test the in vitro acaricide activity of Schinus molle L. (aroeira-salsa) against populations of R. microplus obtained in Areia, micro-region of Brejo Paraibano. For this, parts were collected air of mastic for preparation of the hydroalcoholic solution. To perform biocarrapaticidograma tests, were collected manually engorged females infested steers naturally and was prepared a control group to determine the reproductive efficiency and effectiveness of the hydroalcoholic solution. These indices were calculated according to the recommendations of the Ministry of Agriculture and Supply, referring to the minimum ratio of 95% effective as the standard for effectiveness of acaricides. The statistical analysis was performed using the Kruskal-Wallis test to compare the averages of the efficiencies of the products tested, with a 5% significance (P> 0.05). It was observed that the weight engorged females varied somewhat, with no significant difference. Analysis of the extract tested at a concentration of 50% showed an average efficiency of 47.95%, well below the recommended minimum standard index. Thus, the situation under study, it was found sensitivity of the tested strain of tick extract, however, not reaching the minimum of 95% efficiency index to effectiveness of acaricides, so it is not recommended for the formulation presented insecticide treatment.