Skip to main content
Other
Emergence and Overwintering Brood of Douglas-Fir Beetle Eight Years After the Clover MIst Fire on the Clarks Fork Ranger District, Shoshone National Forest, Wyoming
(1997)
  • Kurt K Allen
Abstract

The Douglas-fir beetle outbreak on the Shoshone National Forest is evaluated for the eighth consecutive year. Adult emergence in 1996 showed a single peak. Overwintering brood in 1996 were used to predict population levels for 1997. Brood levels declined from 1995 but 81% of the overwintering brood are adults. Damage levels (number of trees killed) was at its lowest point in the last 7 years, a 4.5 fold decline from 1995. Brood counts indicate a steady or slight increase in beetle populations; however, in most areas suitable host trees are becoming scarce.

Management alternatives include salvage and sanitation, tree baiting, silvicultural treatments, and no action. Recommended actions vary depending on individual areas.

Disciplines
Publication Date
April, 1997
Citation Information
Kurt K Allen. "Emergence and Overwintering Brood of Douglas-Fir Beetle Eight Years After the Clover MIst Fire on the Clarks Fork Ranger District, Shoshone National Forest, Wyoming" (1997)
Available at: http://works.bepress.com/judith_pasek/27/