ResumoO objetivo deste trabalho foi avaliar a atividade antimicrobiana in vitro da planta Schinopsis brasiliensis contra alguns fitopatógenos de interesse na agricultura. Extratos etanólicos foram obtidos e ensaiados contra o fungoFusarium solani e bactérias do gênero Xanthomonas, Pectobacterium, Ralstonia e Acidovorax. Os resultados mostraram, em geral, um bom desempenho destes extratos contra as bactérias ensaiadas, com valores de concentração inibitória mínima entre 312,5 e 10.000µg.mL -1 . Além disso, um triterpeno (glutinol) e um pirocatecol são relatados como constituintes químicos desta espécie. Conclui-se que S. brasiliensis apresenta potencial para ser usado no controle de doenças de plantas causadas pelas bactérias pertencentes aos gêneros Xanthomonas, Ralstonia e Acidovorax.Palavras-chave: fitopatógenos; Schinopsis brasiliensis; glutinol; pirocatecol; Artemia salina; agricultura. AbstractThe aim of this work was to evaluate the in vitro antimicrobial activity of Schinopsis brasiliensis against certain phytopathogens of agricultural interest. Ethanolic crude extracts were obtained and assayed against Fusarium solani and bacteria pertaining to the genera Xanthomonas, Pectobacterium, Ralstonia and Acidovorax using the broth micro-dilution technique. The results demonstrated a good aptitude of S. brasiliensis extracts to inhibit growth of the majority of the evaluated phytopathogenic bacteria, with MIC values in the range from 312.5 to 10,000µg.mL -1 . Moreover, triterpene glutinol and a pyrocatechol are shown to be the chemical constituents of S.brasiliensis. The results suggest that S. brasiliensis has the potential for agricultural use to control plant diseases
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