| dc.description.abstract | Dispersal is a critical trait during the life history of
the spruce budworm, Choristoneura fumiferana (Clem.), which
leads to its widespread infestation and damage. Budworm
dispersal study is of importance for protecting and
regenerating valuable white spruce, preferred by the forest
industry. One factor that influences dispersal is forest
density. The objectives of this project were to investigate:
1. the effects of harvest treatments on the larval dispersal
of spruce budworm; 2. the effects of harvest treatments on
the responses of budworm male moths to pheromone traps.
Harvest treatments were set up in two plots near Black
Sturgeon Lake in the late fall of 1993 as follows: one uncut
treatment, one partial cut with white and black spruce left,
one partial cut with white spruce and birch and aspen left,
and one strip clearcut. Spruce budworm egg-mass and larval
densities were determined by branch sampling. Sticky traps
were deployed for small larval dispersal, water traps for
large larval dispersal, and pheromone traps for the responses
of male moths to them in the above treatments during 1994 and
1995. | |
