Greybull in Big Horn County, Wyoming — The American West (Mountains)
Agents of Change
When a region is not in a drought a healthy tree can “pitch-out” an attacking bark beetle with sap. The beetles can be successful when a tree is stressed by drought, disease, or old age, or when the beetle population overwhelms a tree. In many cases, the fungi introduced by the beetle clogs the phloem and kills the tree.
The Forest Service Response
To protect the Shell Falls Visitor Center the Forest Service used “anti-aggregative” pheromones to deter bark beetles. Beetles normally use pheromones
Many of the majestic Douglas fir trees in Shell Canyon were killed between 2002 and 2006 from the Douglas fir bark beetle.
After years of drought many of the 150-200 year old Douglas fir trees became less resistant to the relentless attack from the bark beetles.
Erected by US Forest Service.
Location. 44° 34.346′ N, 107° 33.046′ W. Marker is in Greybull, Wyoming, in Big Horn County. Marker is on U.S. 14, on the left when traveling west. Touch for map. Marker is located in Bighorn National Forest. Marker is in this post office area: Greybull WY 82426, United States of America.
Other nearby markers. At least 8 other markers are within 4 miles of this marker, measured as the crow flies. Nature's Destruction (here, next to this marker); Moving Mountains (approx. 3.3 miles away); A 4,000 Mile Journey (approx. 3.3 miles away); Forming Waterfalls (approx. 3.3 miles away); Hummingbirds (approx. 3.3 miles away); Shaping a Canyon (approx. 3.3 miles away); Lifeblood of the West (approx. 3.3 miles away); Oasis in the Desert (approx. 3.3 miles away).
More about this marker.
Categories. • Horticulture & Forestry •
Credits. This page was last revised on June 16, 2016. This page originally submitted on September 4, 2015, by Bill Coughlin of North Arlington, New Jersey. This page has been viewed 193 times since then and 46 times this year. Photos: 1, 2, 3. submitted on September 4, 2015, by Bill Coughlin of North Arlington, New Jersey.