Harmfulness of new invasive phytophages for collectible plants of the Sochi arboretum

Abstract

In the plant taxa surveyed in 2012–2023, 29 new species of invasive organisms for the Sochi «Dendrarium», previously absent in Russia, were discovered. Of these, 4 species are quarantine pests absent in the territory of the Eurasian Economic Union. Among the new invasive arthropod phytophages from the Insecta class, representatives of the Hemiptera order dominate, numbering 14 species. The second place is occupied by the Lepidoptera order, which includes 7 species. Of the Hymenoptera orders, 3 species are harmful, Coleoptera and Diptera - 2 species each. The Arachnida class is represented by 1 species. The assessment of the harmfulness of 29 new species of invasive organisms for the «Dendrarium», carried out according to the maximum and average scores of plant damage, made it possible to identify the most harmful species for the collection and to conclude that mandatory monitoring of all new invaders is necessary. Information about the harmfulness of invasive phytophages is necessary for timely implementation of measures to combat them, which contributes to the preservation of the unique collection of the «Dendrarium».