Forestry in North America

Recent Observations on " Forestry Tropical _ America • In

. ~ :: During recent months members of the Tropical Forest Research Center staff have travelled to many of the countries of the Caribbean area. The purposes of these -t!'ips have been to see trees, forests, and silvicultural and utilization practices that might be useful in Puerto Rico, to collect data on forest plantations for the Latin American Forestry Commission ofF AO, and to obtain infonn...

Admixture in North America

The history of North America has been marked by the encounter of populations from different continents. The discovery of the New World began a period defined by human migrations at a much larger scale than in previous history. This movement of people, voluntary or forced, changed profoundly the human landscape. As populations came into contact, admixture followed in varying degrees depending on...

Medicine in North America

Travel in North America

Phytophthora ramorum in North America

Two apparently unlinked events marked the beginning of one of the most devastating forest diseases known to man in recent times: Sudden Oak Death (SOD). In the mid 1990s, while a novel species of Phytophthora was being isolated from mildly diseased Rhododendron and Viburnum plants in German and Belgian nurseries, the first reports of inexplicable death of tanoaks (Notholithocarpus densiflorus) ...