This research has as objetive to define the methodology of extraction and purification for Moniliophthora roreri and to apply it to 56 isolations of Moniliophthora roreri obtained from Cúcuta, Agua Clara, Sardinata, El Tarra, Tibú, Bucaracica, Teorama and Zulia in Norte de Santander (Colombia). The extraction of DNA was carried out by the protocol proposed by Miranda and Sandoval in 2000, with some proposed modifications by Rocha. To its purification was utilized Chloroform Phenol. Once, it was standarized by the protocol of extraction. It tested with other mushrooms:Metarhizium sp, Botritys cincrea, Fusarium culmorum, Phytophthora cinnamomi. This work intends to continue with the research in the area of Molecular Biology of Moniliophthora roreri and other phytopathogens of economic importance for the region, it promotes the research in micology.