Forestry in Uruguay has grown exponentially for the last 20 years. Even though plantations of Eucalyptus L’Hér. account for about 80% of the total forested area in the country, pine tree plantations are relevant in the production of high quality timber. Following the introduction of pine in 1810, large scale production of pine tree plantations started in 1940, mainly with Pinus radiata Don (Pinaceae) (Porcile 2007). In 1950, seeds of Pinus taeda L. and Pinus elliottii Engelm., among others, were brought from the United States. To date, pine tree plantations occupy 20% of the forested area in the country (250,000 ha mainly in the northern part of the country), mostly with P. taeda and P. elliottii (MGAP 2012). In December 2009, an infestation of bark beetles was officially reported by one of us to The Ministry of Livestock, Agriculture and Fishery. The outbreak was compounded by three species.