Skip to main content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Forest Health News 2018

Tree Mortality Summary of WESTERN BARK BEETLES Now Available

By Jeanine Paschke, USDA Forest Service Contractor


May 2018

Western Bark Beetle Tree Mortality Summary Map

Western Bark Beetle Tree Mortality Summary Map.

The summary of areas with tree mortality from bark beetles in the Western US from 2000 – 2017 is now available. The findings show a 26.3 million acre footprint for mountain pine beetle and a 55.6 million acre footprint for all western bark beetles over the past 18 years. Many areas of pest activity overlap from year to year. The footprint areas are the cumulative area covered by pest activity with no double counting of acres between years. In total, 24 species of bark beetles were included in the calculation. Complexes, insect/disease and other multi damage phenomena that contain a bark beetle component like five-needle pine decline, subalpine fir mortality, true fir pest complex, and pinyon pine mortality are also included.

View/Download

Summary of areas with tree mortality from bark beetles in the Western US from 2000 – 2017