
Goldenrod Gall - Eurosta solidaginis
These galls are pretty common on goldenrod. They are caused by the fruit fly, Eurosta solidaginis, the larvae of which form round galls on the stem of Solidago sp. There is a small hole in this gall, which I'm guessing is an exit hole. Otherwise, it could be from a parasitoid.
Habitat: Meadow

The goldenrod gall fly, also known as the goldenrod ball gallmaker, is a species of fly native to North America. The species is best known for the characteristic galls it forms on several species in the ''Solidago'', or goldenrod, genus.
Similar species: True Flies
By Christine Young
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Uploaded Dec 2, 2021. Captured Mar 9, 2021 16:27 in 5 East St, New Milford, CT 06776, USA.