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spruce budworm

[buhd-wurm]
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noun
  1. 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.
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Origin of spruce budworm

First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018