Acaricidal activity of ethanolic extracts of Stryphnodendron adstringens and Lafoensia pacari and oil resins from Copaifera sp. and Pterodon emarginatus against Sarcoptes scabiei var. suis

Abstract

In vitro bioassay using Sarcoptes scabiei as a test microorganism is a viable method of study for diverse drugs with acaricidal properties. A great amount of assays proves the diverse and efficient biological activity of extracts and compounds from Brazilian savanna plants. This study had as main object, test and compare the acaricidal activity of four Brazilian Cerrado bioproducts: Stryphnodendron adstringens Mart., Copaifera sp., Lafoensia pacari A. St Hil. and Pterodon emarginatus Vogel, 1837. To perform this test S. scabiei mites were collected from crusts removed on ears of highly infected sows. The mites were selected and separated in Petri dishes with three different concentrations (25, 50 and 75%) of each bioproduct, to evaluate their potential acaricidal activity. The mortality of the mites was counted in each Petri dish every hour, during five hours. The statistical analyses demonstrated differences between the bioproducts tested. The oleoresin of Copaifera sp. and P. emarginatus presented the best results with 100% of mites mortality after treatment. The ethanolic extracts of S. adstringens and L. pacari demonstrated lower acaricidal activity when compared to the oleoresins, with little or no difference among the control groups tested. This bioassay demonstrated to be efficient, reliable, low cost and easy accomplishment. Oil resins from Copaifera sp. and P. emarginatus have in vitro acaricidal activity against adult females of S. scabiei var. suis.

Letalidade em Culex quinquefasciatus de compostos secundários de espécies do Cerrado tocantinense: Copaifera reticulata, Pterodon emarginatus

“…Em trabalhos com ácaros utilizando extrato de óleo de resina de Copaifera sp. e Pterodon emarginatus apresentaram 100% de mortalidade em concentrações de (25, 50 e 75%) de bioprodutos (Faria et al, 2017) Alterações morfológicas em larvas de Culex quinquefasciatus foram observadas após inoculação de óleo essencial extraído de folhas de Hyptis suaveolens, com valores de CL50 102,41 ppm e 70 ppm, para 24 e após 48 horas, respectivamente (Silva, 2017). Valloto et al (2011 observaram em estudos de metabólicos em espécies de Copaíba, alterações estruturais em larvas de A. aegypti em relação a diterpeno e taninos.…”