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ARS Home » Plains Area » Brookings, South Dakota » Integrated Cropping Systems Research » Research » Publications at this Location » Publication #375427
Research Project: Productive Cropping Systems Based on Ecological Principles of Pest Management

Location: Integrated Cropping Systems Research

Title: New geographic distribution records of a gall midge, Cystiphora sonchi, in the United States

Author
item Hesler, Louis

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 6/8/2020
Publication Date: N/A
Citation: N/A

Interpretive Summary: New geographic records for the gall midge (Cystiphora sonchi) are documented for the states North Dakota, South Dakota, and Minnesota. Its galls were found on annual sowthistle (Sonchus arvensis) at multiple locations in these states. This gall midge is previously known from several Canadian provinces following its establishment from introductions for classical biological control of annual sowthistle. Various galls of the midge were parasitized by two types of parasitic wasps. These records demonstrate an expanded southward distribution of this gall midge.

Technical Abstract: An extended geographic distribution for the gall midge, Cystiphora sonchi, is newly recorded for three Northern Plains states in the U.S. Galls of C. sonchi were found on annual sowthistle, Sonchus arvensis, at multiple locations in these states. This gall midge is previously known from several Canadian provinces following its establishment from introductions for classical biological control of annual sowthistle. Various galls of the midge were parasitized by two types of hymenopteran parasitoids. These records demonstrate an expanded southward distribution of this gall midge.