Zimmerman Pine Moth Damage to Trunks and Branches
This moth's larvae tunnel just beneath the bark of pine trunks and branches, and heavily infested trees can become deformed or die.
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How Zimmerman pine moth damages trees
The larvae of the Zimmerman pine moth damage trees by tunneling just beneath the bark of the trunk and branches, most commonly on the trunk just below a branch.
These tunnels can girdle — encircle and cut off — the trunk or branches, or physically weaken them to the point where wind or snow easily breaks them.
What heavy infestations look like
Heavily infested trees often become deformed and may die from the infestation. In Nebraska, the pest typically emerges in August, which is a useful window for monitoring susceptible pines.
