
Gall Midge - Asteromyia carbonifera
Females lay eggs on the underside of goldenrod leaves (Solidago sp.). The development from egg to adult takes 4-5 weeks, and there are several generations per year.
The galls are flat and circular. They contain a symbiotic fungus, Botryosphaeria dothidea, which the larvae does not eat. The fungus confers some protection against parasitoid wasps. The females carry spores of the fungus.
Habitat: On goldenrod
Similar species: True Flies
By Christine Young
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Uploaded Jan 11, 2020. Captured Aug 17, 2019 08:13 in 91 Main St, Sharon, CT 06069, USA.