Douglas-Fir Beetle : Dealing with an Epidemic
Getting to the Future Through Silviculture - Workshop Proceedings
In response to an epidemic of Douglas-fir beetle a strategy emphasizing integrated pest management principles was developed and is being implemented on the Cascade Ranger District in west-central Idaho. By the end of 1991, more that 75 epicenters encompassing over 1,000 acres will have been treated. Treatment techniques employed included : (1) redirecting the beetle flight to uninfested host trees via the use of semio-chemical baits or fallen trap trees (simulated windthrow), followed by harvest and (2) cultural treatments that harvest currently infested host trees. Preliminary results indicate that these treatments deployed in a strategic manner are effective on an operational basis at reducing the local beetle populations and susceptible host. The spread of beetle infestation into available host stands appears to have slowed in the areas treated.
Patterson, S. (1992). Douglas-fir beetle : dealing with an epidemic, pp. 73-76 in: D. Murphy (comp) Getting to the Future Through Silviculture - Workshop Proceedings. USDA Forest Service, Intermountain Research Station, General Technical Report INT-291.