Download or read book Internationally Dangerous Forest Tree Diseases written by International Union of Forestry Research Organizations. Working Group on International Cooperation in Forest Disease Research and published by . This book was released on 1963 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication is a cooperative effort that includes descriptions of 57 forest pathogens in the Northern Hemisphere considered to be potentially most damaging to forest production in other continents, with recommendations for special precautions to restrict their intercontinental spread. These diseases occur on 87 genera of forest trees, of which 50 genera are important in the United States.