ABSTRACT.- The incidence of Colletotrichum latent infections during fruit development was evaluated in south-eastern and south-central agroclimatic regions of Uruguay, in Arbequina, Cortina and Picual cultivars. Colletotrichum latent infections were present at all stages of olive fruit development, with a substantially higher incidence in the south-eastern (60.5%) than the south-central region (1.2%). The south-eastern had substantially greater number of days with high relative humidity (>80%) and light rainfall (