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Choristoneura fumiferana, the eastern spruce budworm, is a species of moth of the family Tortricidae native to the eastern United States and Canada. The caterpillars feed on the needles of spruce and fir trees. Eastern spruce budworm populations can experience significant oscillations, with large outbreaks sometimes resulting in wide scale tree ...
Western spruce budworm caterpillar, sixth (final) instar Adult moths are about 1 / 2 inch (12.7 mm) long and have a wing-spread of 7 / 8 to 1 1 / 8 inches (22 to 28mm). Moths of both sexes are similar in appearance, although the females are a bit more robust than males.
Choristoneura freemani Razowski, 2008, western spruce budworm; Choristoneura fumiferana (Clemens, 1865), eastern spruce budworm; Choristoneura griseicoma (Meyrick, 1924) Choristoneura hebenstreitella (Muller, 1764), mountain-ash tortricid; Choristoneura heliaspis (Meyrick, 1909) Choristoneura improvisana (Kuznetsov, 1973)
Picea mariana, the black spruce, is a North American species of spruce tree in the pine family. It is widespread across Canada, found in all 10 provinces and all 3 territories . It is the official tree of Newfoundland and Labrador and is that province's most abundant tree.
Choristoneura orae, the spruce budworm, is a moth of the family Tortricidae. It is found in North America. Caterpillar Pupa Damage. The wingspan is about 24 mm.
[11] [13] For example, the many stands of white spruce, black spruce, and balsam fir are vulnerable to the cyclical outbreaks of a species of the spruce budworm, the Choristoneura fumiferana. [ 14 ] [ 15 ] Since the melting of the great ice sheet, the boreal forest has been through many cycles of natural death through fire, insect outbreaks and ...
Plants and animals are also threatened by introduced species including the gypsy moth (Lymantria dispar), spruce budworm (Choristoneura fumiferana), hemlock woolly adelgid (Adelges tsugae), balsam woolly adelgid (A. piceae) and the Discula destructiva that affects dogwoods and is similar to chestnut blight.
The balsam fir is the preferred main host of the eastern spruce budworm, which is a major destructive pest throughout the eastern United States and Canada. [13] During cyclical population outbreaks, major defoliation of the balsam fir can occur, which may significantly reduce radial growth. [14] This can kill the tree.