In 2008 and 2009 studies on the dynamics poplation of the small red-belted clearwing [Synanthedon Myopaeformis (Brkh.)] (Lepidoptera, Sesiidae) were carried out in apple orchards in Poznań vicinity. In 2008–2009 the small red-belted clearwing appeared in 2-nd decade of May to 2-nd decade of August. The maximum of flights was observed in 1-st and 2-nd decade of July. In 2008, the results of simultaneous studies on parasitoids of Ichneumonidae in apple orchards showed the appearance of a large number of Liotryphon crassiseta (Thom.) (Hymenoptera, Ichneumonidae) – an ectoparasitoid of the small red-belted clearwing larvae, and a synchronization between the parasitoid and pest flights. L. crassiseta, due to its high efficacy in reducing a population of the small red-belted clearwing may be considered as a potential biocontrol agent of the pest.
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