spruce budworm

[ buhd-wurm ]
/ ˈbʌdˌwɜrm /

noun

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.

Origin of spruce budworm

First recorded in 1880–85