Persea americana Mill "avocado", is a very important specie at commercial level, therefore new cultivation areas have increasing; as well as, implementing technological bundles to improve the production. The use of arbuscular mycorrhizal fungi (AMF) in several cultivated species, has been used for the purpose of improving their growth and development. In this research, it was proposed, to determine the effect of the mycorrhization with Glomus intraradices Schenk & Smith in the growth of Persea americana Mill varieties ettinger and zutano in greenhouse conditions. Thirty days old plants were inoculated with 0, 0.5, 1, 2 and 4 grams of G. intraradices and evaluated for 120 days, time which determined the percentage of mycorrhization and variables of stem length and stem diameter, number of leaves, root length, fresh and dry weight of root and above ground. The percentage of mycorrhization ...