The Washington State Department of Natural Resources and USDA Forest Service conduct annual aerial surveys to identify, map and monitor the impacts of insect and diseases on forest lands throughout the state.

Aerial survey data are verified with ground-based observations and are compared against the results of other forest health research happening throughout the state.

Survey results are compiled into an annual report called Washington’s Forest Health Highlights. Also included is information about weather and drought that year, as well as wildfires and their effects on our forests.

Due to the time required to collect and analyze the survey data, then verify and publish the results, the Forest Health Highlights outlines forest health conditions observed in the previous year.

Nonetheless, these reports provide critical benchmarks for the presence or absence, scope, and severity of insects, diseases and other environmental conditions that affect the health of trees and forests in Washington.

Care to know what types of insects and diseases are affecting forest lands where you live? Download a copy of the recently released Forest Health Highlights in Washington – 2018.