Complex of invasive butterflies (Lepidoptera) on the territory of the National Nature Park "Velyky Luh".
The results of the first specialized research on the invasive species' complex of Lepidoptera at the object of nature reserve fund in Ukraine is presented. The research on the complex of invasive Lepidoptera species have been conducted during the period between 2010 and 2020 and took into account the size and degree of conservation of the ecosystem of the National Nature Park "Velyky Luh" (Ukraine). As the result, eight species-insiders belonging to of the order Lepidoptera were registered: Macrosaccus robiniella (Clemens, 1859), Parectopa robiniella Clemens, 1863, Cameraria ohridella Deschka & Dimič, 1986, Plodia interpunctella (Hübner, (1813)), Cydalima perspectalis (Walker, 1859), Hyles hippophaes (Esper, 1789), Hyphantria cunea (Drury, 1773) and Acontia candefacta (Hübner, (1831)). The appearance of box tree moth (C. perspectalis), which was recorded by our researchers for the first time in the National Nature Park, can be considered the youngest invasion. The analysis of food chain showed that all species except of H. cunea feed only on introduced species of woody plants, and therefore do not pose a threat to autochthonic ecosystems which are protected. Feeding characteristics of A. candefacta and P. interpunctella caterpillars within the National Nature Park have not been established. Macrosaccus robiniella, Parectopa robiniella and H. cunea have been shown to have the greatest impact on the phytocenoses of National Nature Park 's. Particular attention is paid to the research on insiders developing on Robinia pseudoacacia L., as it occupies up to 70% of the forest fund of National Nature Park. For the complex of miners of R. pseudoacacia, the settlement of various National Nature Park tracts was assessed and the morphometric analysis of mines was performed. According to the results of the research, both the coefficient of variation and the standard deviation indicate that the morphometric plasticity of Parectopa robiniella mines exhibits more variable polymorphism than Macrosaccus robiniella.