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Montana Field Guide

Montana Field Guides

Goldenrod Gall Moth - Gnorimoschema gallaesolidaginis

Native Species

Global Rank: GNR
State Rank: SNR

Agency Status


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General Description
Recent genetic studies seem to show that populations of the Goldenrod Gall Moth, Gnorimoschema gallaesolidagnis , that feed on one species of Goldenrod (Solidago altissima or Solidago gigantea) are different from those that feed on the other. Even though there's no other way to tell them apart. This could eventually lead to the formation of two different species.

The female lays her eggs in dead leaves on, or in the leaf litter around, the goldenrods, where they stay dormant through the winter. The larva hatches in the spring, seeks out a plant, and burrows into the stem. Its presence causes the goldenrod to form a tumor-like structure called a gall, which encloses the larva and provides food for it. During the summer the larva pupates inside the gall, emerging in early fall to mate and lay eggs.

Observations in Montana Natural Heritage Program Database
Number of Observations: 1

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)

Food Habits
The larvae feed on two species of Goldenrod: Solidago altissima and Solidago gigantea.

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Citation for data on this website:
Goldenrod Gall Moth — Gnorimoschema gallaesolidaginis.  Montana Field Guide.  .  Retrieved on , from