Metcalfa pruinosa Say, 1830 as a new parasite of hop plants in Ukraine

Metcalfa pruinosa (Say, 1830) is an invasive, gregarious sap-sucking insect that spreads rapidly through Ukraine and now detects in Kyiv city, the Autonomous Republic of Crimea, Donetsk, Dnipropetrovsk, Zakarpattia, Odesa, Kharkiv, regions. Additionally, this parasitizes more than 300 species plants, including common hop (Humulus lupulus L.). H. a valuable industrial crop grown many countries, Ukraine. In Ukraine, Lviv, Rivne, Khmelnytskyi, Zhytomyr Specifically, region accounts for almost 74% total area plantations Thus, hop-growing areas are closest to city region, among M. infested important ornamental plant used vertical gardening throughout city. Given above, study aimed characterize “M. — Lupulus” host-parasite system To achieve above purpose, authors visually inspected plants 2021–2022. As result, inspections revealed infestation by parasite predisposed appearance sooty mould. The also identified micromycetes belonging genus Cladosporium Link, 1816 caused mould these honeydew excreted as substrate. found 2021 2022, 4.4% 1.29%, 26.4% 1.94% were damaged mould, respectively. Finally, described signs with mould-causing micromycetes, diagnostic ones. sign was, respectively, presence whitish, sticky, woolly coating on leaves stems, presented from beginning July until end October. non-diagnostic included interveinal chlorosis necrosis, chlorotic necrotic spots leaves. Meanwhile, was black sticky