Parasitoid complex associated with the overwintering generation of Swammerdamia pyrella (Lepidoptera: Yponomeutidae) in Poland.

Edyta Górska-Drabik,Izabela Kot,Katarzyna Kmieć,Katarzyna Golan

doi:10.1093/jisesa/ieu126

Edyta Górska-Drabik, Izabela Kot + Show 2 more

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https://doi.org/10.1093/jisesa/ieu126

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Abstract

The study was conducted on fruit trees where bands of corrugated cardboard were attached around the trunks of the trees, which were used to catch the larvae of overwintering generation of the rufous-tipped swammerdamia moth, Swammerdamia pyrella (Villers) (Lepidoptera: Yponomeutidae). Twenty-five species of parasitic Hymenoptera have been described from S. pyrella in Poland including the report in this article of seven species belonging to the family of Ichneumonidae (three species) and superfamily Chalcidoidea (four species). The parasitoids Gelis agilis F. (Ichneumonidae), Chrysocharis aquilegiae (Erdös) (Eulophidae), Catolaccus ater (Ratzeburg) (Pteromalidae), and Eupelmus urozonus (Dalman) (Eupelmidae) had not been reported from the host before. Triclistus pallipes Holmgren (Ichneumonidae), Dibrachys cavus Walker (Pteromalidae) had the greatest effect on the natural regulation of S. pyrella population. Parasitization for the wintering cocoons of S. pyrella changed each year, but it was high throughout the study. The contribution of secondary parasitoids was much higher than primary parasitoids.

Highlights

The study was conducted on fruit trees where bands of corrugated cardboard were attached around the trunks of the trees, which were used to catch the larvae of overwintering generation of the rufous-tipped swammerdamia moth, Swammerdamia pyrella (Villers) (Lepidoptera: Yponomeutidae)
Twenty-five species of parasitic Hymenoptera have been described from S. pyrella in Poland including the literature data as well as species obtained as a result of own studies (Table 1)
The aim of this study was to document the parasitoid complex of S. pyrella in Poland

Summary

Introduction

The study was conducted on fruit trees where bands of corrugated cardboard were attached around the trunks of the trees, which were used to catch the larvae of overwintering generation of the rufous-tipped swammerdamia moth, Swammerdamia pyrella (Villers) (Lepidoptera: Yponomeutidae). It is important to understand the community of organisms that naturally reduce the number of S. pyrella An assessment of their role makes it possible to evaluate the real threat posed by this species. The larva feeds within a leaf, producing mine, they leave the mines and feed on the surface as an exophagous species. It eats the epidermis and the flesh, leaving the nerves and the bottom skin. Little information is available on the species structure of parasitoid community associated with S. pyrella, especially with the second generation of larvae overwintering in bark crevices of trees (Kadłubowski and Szmyt 1985). This article identifies the Hymenoptera parasitoid complex of S. pyrella in eastern Poland and defines the parasitization level of second-generation caterpillars

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