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.

This study was conducted in 2008–2010 in three apple orchards in western Poland and involved a massive catch of the red-belted clearwing moth, Synanthedon myopaeformis (Borkhausen) (Lepidoptera: Sesiidae), and its parasitoid Liotryphon crassiseta (Thomson) (Hymenoptera: Ichneumonidae) in yellow Moericke traps. The flight time for both species was correlated and fell in the first half of July. However, the correlation between the occurrences of both species was statistically significant only in 2008, when most specimens were caught. A total of 7960 S. myopaeformis were caught, with a 2:1 male:female sex ratio, and 415 adult L. crassiseta. No correlation between the numbers of S. myopaeformis and L. crassiseta in relation to age, variety of trees, or orchard surface area was noted. Significant differences between the catches of S. myopaeformis and L. crassiseta were reported in particular years. Furthermore, clear differences in the yields of S. myopaeformis and L. crassiseta between traps situated in the orchard and those on its edges were recorded, particularly in the orchard surrounded by cultivated fields. Yellow pan-traps could be used more widely in order to monitor and control the abundance of S. myopaeformis, especially by catching its females.

Refuge habitats have a stabilising effect on the entomofauna in the agricultural landscape. The objective of this research was to follow the migrant activity of aphids in two types of refuge habitats: shrubs and roadsides of rural areas. Moericke traps method were used for testing the seasonal activity of aphids. The dynamics of species numbers were assessed, and the phenology of the dominating taxa was examined. From 2008 to 2010, more than 5,000 winged aphids from 94 species were caught in shrub habitats, and 83 species were caught in rural roadside habitats. The characteristics of aphid groups were defined on the basis of selected indicators.Annually, in both locations, flight activity was shown by a group of several taxa. The rank position of the species was varied in the particular sites and years of the research. Species participation differed when analysing aphid flights, so the seasons were divided into three separate periods: spring, summer, and autumn.