[buhd-wurm] 
| the larva of a common tortricid moth, Choristoneura fumiferana, that is a destructive pest primarily of spruce and balsam fir in the northern and northeastern U.S. and in Canada. |
| spruce budworm n. The highly destructive larva of a tortricid moth (Choristoneura fumiferana) of the northern United States and southern Canada that feeds on the needles, buds, and branch tips of spruce, fir, and other forest conifers. |