Twenty one accessions from the Avocado Germplasm Bank of CORPOICA, Palmira Research Station, were evaluated with two pathogenic strains of the oomycete, Phytophthora cinnamomi Rands. The objective of this project was to identify avocado accessions that could be potentially used as rootstocks as a cultural control strategy for preventing root rot disease. Disease progression was evaluated by using mycelium of the pathogen by cut-stem inoculation. The length and width of symptom progression were measured periodically. These data were used to calculate the area under the disease progression curve (AUDPC). A randomized complete block design (RCBD), with a factorial design of 3 x 21 in subdivided parcels (two strains of the pathogen, a control strain, and 21 avocado accessions) was used. Eight readings were taken per plant through time. Statistical analysis showed significant differences using the AUDPC for some avocado accessions. Tukey's test revealed five tolerance levels. Accession ‘NATU-001’ from Tumaco, Nariño, was identified as promising for its high tolerance and ‘CANO-008’ from Norcasia, Caldas, as a tolerant control accession had the second lowest value of AUDPC. Susceptible accessions used as control, e.g. ‘Hass’ variety and rootstock ‘Topa-Topa’, had very high susceptibility to the pathogen along with ‘QUIQUI-030’ accession from Quimbaya, Quindío, Colombia