|Sponsor:||Tolko Industries Ltd. - High Level Lumber Division|
This project was a continuation of DMI-01-05, which had as its original purpose an intention to explore stand tending as a means to reduce the vulnerability of spruce stands to spruce budworm defoliation.
Original objectives included determining the extent to which cutting patterns & harvest intensities and their interaction affect stand vulnerability to budworm damage; and determine the extent to which budworm populations are affected by changes in their dispersal, natural enemy complex, host conditions and fecundity induced by cutting patterns and intensities.
The original project was initiated in 1996 following discussions on alternatives to spraying spruce budworm populations to manage outbreaks of the pest. This project continues the work for the final 3 years of a six-year study. The experiment was conducted at a field site located near Zama, Alberta.
It would appear that the pattern of harvesting has the most influence on spruce budworm population performance with intensity of removal having less influence. The detailed response of spruce budworm populations and the vulnerability of trees in the various treatment blocks is an area for future assessment.
Study results to date are contained in a number of progress reports including the Establishment Report dating back to August 1998. The Establishment Report, and Progress Reports 2 & 3 are located in and reported under FRIAA Project No. DMI-01-05, and Progress Reports 4, 5 & 6 are located in and reported under Project No. TOLKHL-01-06. All are entitled “The Establishment of Silvicultural Treatments to Control Spruce Budworm [Choristoneura fumiferana Clemens] Damage in Northwestern Alberta”. Progress Report No. 6 serves as the final report as it summarizes work conducted over the period 1999 to 2002 inclusive, following application of treatments in 1997, in addition to details of findings in 2002.