Hylobius warreni, or Warren's rootcollar weevil, is a common pest of spruce and pine throughout Canada.

It causes considerable damage to native species of spruce both in natural stands and in plantations (Rose and Lindquist 1985).

[1] Hylobius warreni is 8–11 millimetres (0.31–0.43 in) long, and has a dull black body colour.

It is clothed with fine grey scales between the patches of white.

[2] Trees growing in wet ground or in deep layers of humus are most susceptible to attack.