КОМАХИ-КСИЛОФАГИ ЛИСТЯНИХ ПОРІД У НАЦІОНАЛЬНОМУ ПРИРОДНОМУ ПАРКУ «ГОМІЛЬШАНСЬКІ ЛІСИ»

Abstract

The aim of the research was to determine the ecological features and to evaluate the harmfulness of the most common xylophagous insects at the territory of the National Nature Park «Gomilshansky Forests». In deciduous forests of the National Nature Park «Gomilshansky Forests», 22 species of xylophagous insects from 16 genera of three families have been found, i.e. longhorn beetles (Cerambycidae), jewel beetles (Buprestidae) and bark beetles (Curculionidae: Scolytinae). The vast majority of species are polyphages. Five species (Xylotrechus antilope, Agrilus biguttatus, A. hastulifer, A. laticornis and A. sulcicollis) were found only in the English oak, Dicerca (Dicerca) aenea was found only in the elm, and other xylophagous insects were found in different deciduous trees. The jewel beetle Agrilus biguttatus, the bark beetles Scolytus intricatus, Xyleborus dispar, Xyleborus monographus and Xyleborinus saxeseni colonized the most vital trees. The longhorn beetle Anisorus quercus colonized drying up trees, and the longhorn beetles Poecilium alni and Prionus coriarius colonized only dead trees. Potential injuriousness of each species was evaluated considering both physioogical injuriousness and technical injuriousness. Four species (18.2 %) – A. biguttatus, S. intricatus, Xyleborus dispar and Xyleborinus saxeseni – are potentially the most harmful with the frequency of occurrence 7 %, 5 %, 1 %, and 1 % respectively. Among 9 moderately harmful species (40.9 %), the most spread are Plagionotus arcuatus, P. detritus and Saperda scalaris (11 % each). Slightly harmful are 5 species, or 22.7 %, harmless are 6 species, or 18.2 %. The data obtained are the basis for further comparing the species composition and harmfulness of xylophagous insects in the zones with different management regimes of the national nature park.