Forest Health

A healthy forest is a productive forest

Maintaining a healthy forest is an important objective for most forsetland owners. In this section, we'll answer some basic questions about tree health:

  • Are you trees healthy or not? How can you tell?
  • What are the most common tree health problems, and why do they occur?
  • How can you maintain healthy trees and prevent future problems?

Become an Oregon Forest Pest Detector! Find out more at

For more information, please conact:
Dave Shaw, Oregon State University Extension Specialist



We have compiled a list of links to publications, videos, websites, and more...

General Forest Health Information

Insects and Disease

-Biology and Control of Douglas-fir Needle Midge in Christmas Trees

-Managing Insects and Diseases of Oregon Conifers

-Common Insect Pests and Diseases of Sitka Spruce on the Oregon Coast

-Swiss Needle Cast of Douglas-fir in Oregon

-Identifying and Managing Christmas Tree Diseases, Pests, and Other Problems

-Disease and Insect Pests of Pacific Madrone

-Stop the Spread of Sudden Oak Death

-Common Insect Pests and Diseases of Shore Pine on the Oregon Coast

-Douglas-fir Beetle (FIDL5)

-Armillaria Root Disease (FIDL78)

-Swiss Needle Cast (FIDL181)

Invasive Species

  • Oregon Department of Forestry Invasive Species website
  • Invasive and Exotic Species of North America website

Vertebrate Damage

Abiotic Damage

Climate and Forest Health