More than one million hectares are forested with exotic trees in Uruguay. Eucalyptus plantations represent 80% of forested area in the country, while pine tree plantations occupy around 20%. The bronze bug is a major pest of Eucalyptus tree plantations worldwide. The first outbreak of this species in Uruguay was reported on summer 2008. Soon after that, a monitoring network was installed throughout the country. Here, we present a preliminary approach of the seasonal dynamics of the bronze bug on four permanent monitoring stations.