Washington Department of Natural Resources posted by:
USDA Forest Service
Pacific Northwest Region

Forest Health Protection



Washington Forest Health Issues in 2003

Washington Forests
General Forest Conditions
Aerial Survey
Overview
Survey Results

Animal and Abiotic
Drought

Fire
Bear Damage

Douglas-fir Beetle

Beetle populations continue at outbreak numbers for the last several years, and overstocked, drought-stressed, mature trees allow populations of beetles to persist at epidemic levels in some areas.

Almost 74,000 acres of Douglas-fir mortality were mapped in eastern Washington in 2003. Although down substantially from the last few years, Douglas-fir beetle continues to kill large numbers of mature Douglas-fir in Spokane, Pend Oreille, and Stevens counties!


Trees killed by Douglas-fir beetle near Omak, WA

Aerial view near Omak WA. The yellow/red trees are recent mortality and the gray trees were killed in previous year

Tree damage from the ice storm of 1996-1997, followed by prolonged droughts continues to stress trees!

In the southeastern Cascades, forests previously defoliated by the western spruce budworm are now experiencing mortality due to the Douglas-fir beetle.

Historical Activity and Drought Correlation

Additional Information
 


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