The gall adelgid (Adelges cooleyi) is an adelgid species that produces galls in spruce trees. They infect the new buds of native spruce trees in the foothills of the Rocky Mountains in the spring. They also attack blue spruce to a lesser degree. The insects complete two generations within the year. They require two different trees for its life cycle, the second being the Rocky Mountain Douglas-fir. They may also attack Sitka, Engelmann, or white spruce. The many different species of adelgids produce different galls on different spruce species.
The Cooley spruce gall adelgid (Adelges cooleyi Gillette) is mainly a western species that usually alternates between white spruce and Douglas fir. It is rare in eastern Canada. In Ontario, the galls are found mostly on Colorado spruce.
The galladelgid (Adelges cooleyi) is an adelgid species that produces galls in spruce trees. They infect the new buds of native spruce trees in the foothills...
The pineapple galladelgid (Adelges abietis) is a species of conifer-feeding insect that forms pineapple-shaped plant galls on its host species, commonly...
of Adelges, an aphid-like insect that causes galls to form. Nymphs of the pineapple galladelgid form galls at the base of twigs which resemble miniature...
as the eastern spruce budworm. They are also used by the larvae of galladelgids (Adelges species). In the mountains of western Sweden, scientists have...
of adelgids also infest fir trees, those include the pine bark adelgid, the Cooley spruce galladelgid (Adelges cooleyi), and the eastern spruce gall adelgid...
nearly cosmopolitan in their distribution. Aphids, and the closely related adelgids and phylloxerans, probably evolved from a common ancestor some 280 million...
large die-off of Fraser fir caused by non-native insect balsam woolly adelgid. Built in 1959, the observation tower features a circular observation platform...
from adelgids by the fact that they have a vulva instead of a sclerotized ovipositor, and usually lack the wax glands or plates found in adelgids. They...
Dendroctonus frontalis (southern pine beetle), and Adelges tsugae (hemlock woolly adelgid). The species Agrilus planipennis (emerald ash borer) and Lymantria dispar...
hemlock, a tree fast disappearing after infestation by the hemlock wooly adelgid, as well as oak and hickory common in the Virginia section of the Appalachians...
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