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The propolises are resinous complex sustances produced by bees. Their chemical composition is variable in according to the vegetal source. This study was realized with samples from northeast of Argentina. The aim of work were to check the fungicide and bactericide effects of etanolic solutions of propolis from different sites in Misiones province, on plant pathogens, considering the predominant vegetation in the original areas on the oxidation indexandfenolic compositions. As results in three studied areas the vegetation has been modified anthropically in different form, and the products are corresponding with the introduced flora characteristics, composed of 7 different plant species in El Soberbio, 7 species in El Dorado and 10 species in Apostoles. The physic and chemical proprieties and therapeutic action in propolis from the three collection areas in the Misiones province were similar. The oxidation rate was different in the three study areas (7.37, 1.30 y 18.4), while the phenolic content showed no significant difference. Their antimicrobial activity to probed concentrations (2, 4, 6, 8 y 10 %), don’t were effectives for control on the fungical strains but it is positive by the bacterial control of genus Bacillus.