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Dieback of the leader (main terminal) of a blue spruce from feeding and tunneling by larvae of white pine weevil, Pissodes strobi.

Dieback of the main terminal of a blue spruce from feeding and tunneling by larvae of white pine weevil. Credit: Whitney Cranshaw, Colorado State University, Bugwood.org
Credit: Whitney Cranshaw, Colorado State University, Bugwood.org
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