Do our forestry practices cause spruce budworm outbreaks?
We know from fossil records and from tree-ring analysis of very old trees that spruce budworm outbreaks have occurred for hundreds of years. There were major budworm outbreaks in the...
We know from fossil records and from tree-ring analysis of very old trees that spruce budworm outbreaks have occurred for hundreds of years. There were major budworm outbreaks in the...
Growth loss and tree mortality during a spruce budworm outbreak vary with its duration, severity, tree species and age. Balsam fir is the preferred host of the spruce budworm. The...
There is currently a ‘hot spot’ south of Campbellton New Brunswick. However populations are much lower than in Québec. Scattered budworm defoliation was observed from both the air and the...
The first indication of a spruce budworm outbreak is red individuals or groups of spruce and fir trees. The reddening of trees is the result of spruce budworm feeding on...
Spruce budworm larvae consume the new buds, current-year foliage, and sometimes older needles of balsam fir and spruce trees: often for several years. The defoliation causes growth loss (up to...
It is unknown how outbreaks start. Some researchers have suggested that an excess of over mature host trees in a given area can contribute to the rapid rise of spruce...
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