Superparasitism by Torymus cyanimus (Hymenoptera: Torymidae) in the Volga-Kama region

Title:

Superparasitism by Torymus cyanimus (Hymenoptera: Torymidae) in the Volga-Kama region

Creator:

Basov, Vladimir M.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:f8954c5b-024d-4913-8ffc-6eee597286cd
uuid:f8954c5b-024d-4913-8ffc-6eee597286cd

Subject:

Torymus cyanimus, Torymidae, parasitoids, Eurytoma serratulae, E. robusta, Urophora cardui, Cirsium setosum, hyperparasitism, multiparasitism, and superparasitism

Type:

article, model:article, and TEXT

Description:

On the basis of a twenty-year investigation, the life-cycle of Torymus cyanimus Boheman (Hymenoptera: Torymidae), a hyperparasitoid of a gall-forming fly in the Volga-Kama region is described. This parasitoid is the top-consumer in a food chain on Cirsium setosum (Willdenow) Iljin, in which the herbivore is Urophora cardui L. (Diptera: Tephritidae) and the primary parasitoids belong to the genus Eurytoma (Hymenoptera: Eurytomidae). Mating and oviposition behaviour were studied, and the superparasitism and larval cannibalism investigated in the second parasitoid generation. The superparasitism in T. cyanimus evolved in connection with the ovipositor elongation, leading to eggs being laid later when the fly host has already been completely consumed by larvae of Eurytoma serratulae F. Hyperparasitism and larval cannibalism in the second generation of T. cyanimus might account for the evolution of hyperparasitism in this species.

Language:

English

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Source:

European Journal of Entomology | 2002 Volume:99 | Number:3

Harvested from:

CDK

Metadata only:

false