This title is part of UC Press's Voices Revived program, which commemorates University of California Press’s mission to seek out and cultivate the brightest minds and give them voice, reach, and impact. Drawing on a backlist dating to 1893, Voices Revived makes high-quality, peer-reviewed scholarship accessible once again using print-on-demand technology. This title was originally published in 1981.

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.