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Natural enemies of the gall-maker Eugeniamyia dispar (Diptera, Cecidomyiidae): predatory ants and parasitoids

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Author(s): MENDONÇA M. de S., Jr. | ROMANOWSKI H. P.

Journal: Brazilian Journal of Biology
ISSN 1519-6984

Volume: 62;
Issue: 2;
Start page: 269;
Date: 2002;
Original page

Keywords: Eurytomidae | Formicidae | gall | Myrtaceae | parasitoid | predation | Rileya | Pheidole

ABSTRACT
Natural enemies of the gall maker Eugeniamyia dispar (Diptera: Cecidomyiidae) were studied on the urban area of Porto Alegre, RS, Brazil from October 1993 to March 1996. Galls and associated arthropods were followed weekly in the field on individual host plants (Eugenia uniflora, Myrtaceae) and also in the laboratory. Three species of ants attacked the galls, the most common being Pseudomyrmex sp. A proportion of galls was parasitised by Rileya sp. (Eurytomidae). The adults of this solitary ectoparasitoid were also attacked by the ants and fell prey to spider webs.
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