Physiological harmfulness of xylophagous insects in poplar and aspen stands in the Left-Bank Forest-Steppe

Introduction
 Poplars and aspens (Populus sp.) are common in forest stands, shelterbelts, rural landscaping, special plantations as short-rotation woody crops; they promising tree species for biofuel bioenergy production. Wood-boring insects browse galleries a stem or branches that interrupt sap circulation promote infestation by plant pathogens. Some of these can additionally weaken trees using foliage, bark, phloem maturation feeding. All effects comprise the physiological harmfulness wood-boring insects, whereas their technical depends on size depth galleries, location at stem, timber value given species.
 The approach insect assessment was suggested E. Mozolevskaya it is implemented oak, pine, spruce, birch, elm. It shown same varies significantly depending environmental conditions population density.
 aim research to evaluate xylophagous Populus sp. Left-Bank Forest-Steppe considering ability colonize damage under certain health, transmit pathogens, well host range occurrence.
 Materials Methods
 carried out 2019–2022 Poltava, Sumy, Kharkiv regions archive plantation poplar clones, shelterbelts. collections Yu. Skrylnik since 2006 specified territories were also included analysis. In analysis, only those used, which development stems proved our and/or supported publications. plants occurrence estimated. Their calculated sum scores activity (ability health condition), during feeding, vector pathogens.
 Results Conclusions
 study, 72 analyzed, particularly 40 Cerambycidae, 19 Buprestidae, 7 Curculionidae, 2 Sesiidae, 3 Cossidae. proportion abundant highest among Scolytinae: Xyleborini. Species with high predominate monophagous particularly, Agrilus suvorovi, Cryptorhynchus lapathi, Xyleborus cryptographus, Paranthrene tabaniformis, Acossus terebra. Only five (S. populnea, S. octopunctata, perforata, scalaris, carcharias) cause significant feeding foliage bark branches. average score species, almost twice low two times less rare single species. High (10 more) poplars estimated nineteen 13 populnea carcharias, 12 Trypodendron signatum, Tremex fuscicornis, Xyleborini Tab., 4 Fig., 35 Ref.