The violet gall midge. Phytophaga violicola (Coquillett).

https://portal.ct.gov/-/media/CAES/DOCUMENTS/Publications/Bulletins/b234pdf.pdf
Authors: Garman, P.
License: Public Domain / CC0
Publication Year: 1922
Citation (MLA Form): Carman, P. 1922. The violet gall midge. Phytophaga violicola (Coquillett). Conn. Agric. Exp. Stn. New Haven Bull. 234: 152-156.
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