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The research was carried out in 2005 − 2007 in the area of the Kórnik Arboretum and covered parasitoids of the Pimplinae, Poemeniinae and Diacritinae (Hymenoptera, Ichneumonidae) subfamilies, which control a number of plantdamaging phytophages. The quality and quantity composition of the parasitoids was defined, and the characterization of Pimplinae communities was carried out on the basis of the following biocenotic indices: Shannon’s diversity index H’, Pielou’s evenness index J’ and Simpson’s diversity index d. The Pimplinae communities were compared in terms of quality using the method of the Marczewski-Steinhaus MS index. Thirty-one species of Pimplinae were found; they account for 23.3% of the national fauna and 43.0% of species reported for Wielkopolska. Three species of Poemeniinae and one species of Diacritinae were also found. Among Pimplinae the prevailing species were those which decrease the number of pests belonging to exo- and endophytophages of Micro- and Macrolepidoptera. The dominants were: Pimpla contemplator (Muelle.) − 24.9%, Pimpla flavicoxis Thoms. − 12.3%, Pimpla insignatoria (Grav.) − 9.1%, Itoplectis maculator (F.) − 6.3% and I. alternans (Grav.) − 5.9%. Poemeniinae included Poemenia brachyura Holmgr. and P. herctica (Grav.), belonging to parasitoids of xylophages. Diacritinae were represented by Diacritus aciculatus (Voll.), whose trophic links are not yet known.

folia horticulturae

Parasitic wasps of the Pimplinae, Poemeniinae and Diacritinae (Hymenoptera, Ichneumonidae) subfamilies at Kórnik Arboretum