Defoliation
caused by
Western Spruce Budworm

Please Note: Shaded areas show locations where trees were defoliated. Intensity of damage is variable and not all trees in shaded areas are defoliated. For more site-specific information, download arcgis files.

Source: Annual aerial insect and disease surveys flown by USDA Forest Service, Oregon Department of Forestry, and Washington Department of Natural Resources.

= Host Type: True Fir/Douglas-fir/Spruce

Source: 250m forest type map developed by USDA Forest Service - Remote Sensing Application Center.

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This webpage was last updated on July 20, 2005.