Adelges is a genus of insects which feed on conifers.

However, galls characteristic of each species are formed only on spruce.

Six generations are usually needed to complete the 2-year cycle, and in the case of species having an alternate host, winged adults about 2 mm long are formed only in the generations that move from one host to the other.

The spruce gall adelgid (Adelges lariciatus Patch) occurs in alternate years on spruce and larch from Alberta to the Maritimes and in adjacent parts of the United States.

This Hemiptera article related to members of the insect suborder Sternorrhyncha is a stub.