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

New! Resources to assist landowners and natural resource professionals to maintain Forest Health in the Columbia Gorge.

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