Abstract
Exeristes roborator (Fabricius, 1793) is usually known as the parasitoid of lepidopteran pupae, but was also recorded as the parasitoid of diff erent Cynipidae species in the southern parts of Europe and parts of Middle East. In samples of Diplolepis rosae (Linnaeus, 1758) and D. mayri (Schlechtendal, 1876) galls collected in the eastern Carpathian Basin after 2010 E. roborator appeared in large numbers compared to those collected before 2010, when the species was not present in the gall communities. Here we report the diff erential presence of Exeristes roborator in the two rose gall species, which points out the host shift of the ichneumonid parasitoid spreading towards north. With 3 figures.
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