News reports of the western spruce budworm
ravaging the British Columbia forest, or the brown spruce long-horn beetle infesting more than 6,000 trees in Halifax are indications the Canadian ecosystem is unprotected in the face of growing global trade, travel and tourism.
An exception is the southern population of the western spruce budworm
(Choristoneura occidentalis) in New Mexico, which had two outbreaks during troughs of sunspot activity.
Alaska: Entire watersheds are at extreme risk in Alaska, where over three million acres of spruce forests have been killed by spruce budworm
in the last
Squarely in his sights is the Spruce Budworm
, considered one of the forestry industry's most destructive pests.
(Choristoneura fumiferana) was present in the mature white spruce stands for two years during the 1989 through 1993 time period.
Among the company's largest ongoing projects is tackling the cyclical spruce budworm
problem in Saskatchewan.
Stand response to western spruce budworm
and Douglas-fir bark beetle outbreaks, Colorado Front Range.
This is because, in spruce budworm
, the recruitment of a new generation can be enormously influenced by the proportion of eggs brought in by immigrating moths.
First comes the spruce budworm
which doesn't just fancy spruces but quite a few other trees, especially Douglas-fir.
Defoliation damage by spruce budworm
(Choristoneura fumiferana Clem.) and the occurrence of previous browsing by moose were also recorded for all trees each year.
Virtually all of the fir decline occurred in Maine, where the spruce budworm
has been active.
Western spruce budworm
and dwarf mistletoe infest the crowded firs.