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UNISEXUAL BROODS IN THE GALL MIDGE CYSTIPHORA SONCHI (BREMI) (DIPTERA: CECIDOMYIIDAE)

Published online by Cambridge University Press:  31 May 2012

A.S. McClay
A.S. McClay
Affiliation:
Alberta Environmental Centre, Vegreville, Alberta, Canada T9C 1T4
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Extract

The gall midge Cystiphora sonchi (Bremi) has been released and established in Alberta and other Canadian provinces as a biological control agent for the introduced weed perennial sow-thistle (Sonchus arvensis L.) (Peschken et al. 1989). Cystiphora sonchi oviposits in the expanding leaves of S. arvensis (DeClerck-Floate and Steeves 1995), where the-larvae form pustule galls, each containing a single larva. They pupate in a cocoon in the gall or sometimes in the soil after exiting from their galls. Adults are short-lived (usually 1 day or less) and do not feed (Peschken 1982). Under field conditions in Alberta, C. sonchi produces three generations a year (Peschken et al. 1989)

Type
Articles
Information
The Canadian Entomologist , Volume 128 , Issue 4 , August 1996 , pp. 775 - 776
Copyright
Copyright © Entomological Society of Canada 1996

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References

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