Claim 1: a method for preventing or treating a bacterial disease in a Plant, characterised in that it consists in applying a Strain of Streptomyces microflavus NRRL B - 50550 bactericidal and / or a Mutant that has all the same the identifying characteristics of the strain, and Or at least a metabolite produced by the respective Strain to the plant.A part of the plant and / or place. The Method of claim 19: any of claims 1 to 14, wherein the bacterial disease is caused by a bacterium selected from the group consisting acidovorax avenae, acidovorax konjaci, Burkholderia Burkholderia spp., glumae, Candidatus Liberibacter spp., Candidatus Liberibacter africanus, Candidatus Liberibacter americanus, Candidatus Liberibacter asiaticus, Candidatus Phytoplasma spp., and Clavibacter michiganensis subsp. Xyli Clavibacter michiganensis subsp. Cynodontis, Clavibacter xyli subsp. Xyli, Corynebacterium, Curtobacterium flaccumfaciens, Erwinia spp., janibacter melonis, Pectobacterium carotovorum subsp.Atrosepticum, Pectobacterium carotovorum subsp. Carotovorum, Pseudomonas syringae pv. Actinidae, Pseudomonas syringae pv. Glycinea, Pseudomonas syringae pv. Lachrymans, Pseudomonas syringae pv. Tomato, Pseudomonas syringae, Ralstonia solanacearum, Serratia marcescens, Spiroplasma citri, Spiroplasma Spiroplasma kunkelii, phoenecium, Streptomyces spp., Xanthomonas albilineans, Xanthomonas axonopolis PV. Xanthomonas axonopodis pv Citri. Glycines, Xanthomonas axonopodis, Xanthomonas campestris pv. Musacearum, Xanthomonas campestris pv. Pruni, Xanthomonas campestris pv. Vesicatoria, Xanthomonas campestris, Xanthomonas fragariae, Xanthomonas oryzae pv. Transluscens Xanthomonas spp., Xanthomonas oryzae, and Xylella fastidiosa.Claim 21: a method for preventing or treating a bacterial disease in a Plant, characterised in that it consists in applying a fermentation product which comprises a Strain of Streptomyces producing gougerotina to the Plant, a part of the plant and / or place.
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