Campbell, Sally; Liegel, Leon, tech. coords. 1996. Disturbance and 

 forest health in Oregon and Washington. Gen. Tech. Rep. PNW- 

 GTR-381. Portland, OR: U.S. Department of Agriculture, Forest 

 Service, Pacific Northwest Research Station and Pacific Northwest 

 Region; Oregon Department of Forestry; and Washington Depart- 

 ment of Natural Resources. 105 p. 



The scope and intensity of disturbance by such agents as fire, 

 insects, diseases, air pollution, and weather in Pacific Northwest 

 forests suggests that forest health has declined in recent years in 

 many areas. The most significant disturbances and causes of tree 

 mortality or decline in Oregon and Washington are presented and 

 illustrated. We discuss the interrelations of disturbance with forest 

 management activities and the effect on native trees and suggest 

 some solutions for reducing the severity of disturbance. One chapter 

 reports on a forest health monitoring pilot project. 



The Forest Service of the U.S. Department of 

 Agriculture is dedicated to the principle of multiple 

 use management of the Nation's forest resources for 

 sustained yields of wood, water, forage, wildlife, and 

 recreation. Through forestry research, cooperation 

 with the States and private forest owners, and 

 management of the National Forests and National 

 Grasslands, it strives — as directed by Congress — to 

 provide increasingly greater service to a growing 

 Nation. 



The United States Department of Agriculture (USDA) 

 prohibits discrimination in its programs on the basis 

 of race, color, national origin, sex, religion, age, 

 disability, political beliefs, and marital or familial 

 status. (Not all prohibited bases apply to all pro- 

 grams.) Persons with disabilities who require alter- 

 native means of communication of program informa- 

 tion (Braille, large print, audiotape, etc.) should 

 contact the USDA Office of Communications at (202) 

 720-2791 . 



To file a complaint, write the Secretary of Agriculture, 

 U.S. Department of Agriculture, Washington, DC 

 20250, or call (202) 720-7327 (voice) or (202) 720- 

 11 27 (TDD). USDA is an equal employment opportu- 

 nity employer. 



Pacific Northwest Research Station 



333 S.W. First Avenue 



RO. Box 3890 



Portland, Oregon 97208-3890 



