Abstract: A composition used to obtain a biological fungicide and bactericide without the use of antibiotics to control plant diseases, consisting in native strains. The composition is characterized in that it includes strains of the bio-controllers Bacillus spp and Brevibacillus parabrevis in a concentration of ten to the power of eight spores/g at a ratio of 1:1:1:1 for each of the strains, with a broad-spectrum action on phytopathogenic bacteria and late blight.