Acaricide action on Rhipicephalus microplus of extracts, fractions and compounds obtained from Lecythis lurida (Lecythidaceae)
DOI:
https://doi.org/10.5007/2175-7925.2015v28n4p119Abstract
Rhipicephalus microplus (cattle tick) stands out as one of the most economically important ectoparasites of cattle, but controlling this species has been difficult because populations are resistant to synthetic acaricides. The goal of this study was to evaluate the efficiency of Lecythis lurida extracts, fractions and secondary metabolites against R. microplus. This is the first report of a phytochemical and biological study of L. lurida, which was collected in the cerrado of eastern Maranhão where it is known as sapucarana. In this region, L. lurida stands out for its population density and flowers, which are commonly visited by several bee species. The compounds obtained from L. lurida during this study were triterpenoids, such as friedelanol and friedelin (the major compound), in addition to mixtures of triterpenes and steroids. The evaluation of acaricide activity on larvae and engorged ticks of R. microplus revealed that only some of the extracts and fractions, obtained from the leaves and bark of L. lurida, had moderate activity.
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