Saperda calcarata

Poplar Borer. Larval hosts are quaking aspen, cottonwood, and balsam poplar. Eggs are laid in the spring and summer in small notches chewed in the bark by the female. Upon hatching larvae feed on the cambium layer for the first season and later move to the sapwood and heartwood. Larvae take 3 to 4 years to develop into adults. Adult Poplar Borers feed on the leaves of the host trees. These are large beetles 20 to 30 mm long.