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Distribution and host range of the citrus flatid planthopper (Metcalfa pruinosa (Say, 1830)) in Kyiv

Metcalfa pruinosa (Say, 1830), the citrus flatid planthopper, has exhibited a rapid spread throughout Ukraine and established its presence in Kyiv since 2016. Despite this, comprehensive data regarding its host range and distribution within the Kyiv region remains scarce. Therefore, this study aimed to inspect the vegetation in various districts of Kyiv to discover distribution and host plants of citrus flatid planthopper. To do this, we inspected the flora in 2021–2023. In 2021, we researched the only two plots located in the Darnytskyi and Holosiivskyi districts of Kyiv, respectively. Vegetation in different locations of the Darnytskyi, Holosiivskyi, and Podilskyi districts of Kyiv was examined in 2022. In 2023, the flora in 23 distinct locations, ensuring coverage of all administrative districts within Kyiv, was surveyed. As a result, the presence of citrus flatid planthopper in all districts of Kyiv was registered. Furthermore, the distribution of M. pruinosa did not encompass the whole area of Kyiv, but only their parts. Hence, it is deduced that the distribution pattern of M. pruinosa in Kyiv is characterized by disjunction. In addition, the study found that in Kyiv, the citrus flatid planthopper damages 55 plant species belonging to 49 genera, 35 families, and 23 orders. However, given the previously known hosts of M. pruinosa in Kyiv, the total host range of citrus flatid planthopper in Kyiv includes at least 130 plant species belonging to 95 genera, 57 families, and 30 orders. Moreover, according to both this and previously known data, the most represented order, family, and genera in host range of M. pruinosa in Kyiv were order Rosales Bercht. & J. Presl, family Rosaceae Juss., genera Acer L. and Prunus L., respectively. Most frequently M. pruinosa damaged Humulus lupulus L., Juglans regia L., and species of the genus Acer L. Further investigation is needed to reveal distribution rate of M. pruinosa in all type of localities in Ukraine, to list host plants within them and to study pest biology in the newly occupied territories.

Key words: hop, maple, walnut, Humulus lupulus, Acer, Juglans regia, pest, parasite.

 

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