Abstract
Inspection of green stands in order to identify representatives of the genus Phyllonorycter Hübner, 1822 (Lepidoptera: Gracillariidae, Lithocolletinae), which damage woody plants in Belarus, revealed a new species for the fauna – beech midget (Phyllonorycter maestingella (Müller, 1764)). In 2014 we discovered this new invasive insect pest of the beeches (Fagus spp.) in Belarus for the first time. During 2014–2018 leaf mines of Ph. maestingella were recorded in 2 localities, Minsk and Brest, on 3 hostplant species, Fagus sylvatica Linnaeus, 1753, Fagus grandifolia Ehrhart, 1788, and Fagus orientalis Lipsky (1898). It is important to note that American beech (F. grandifolia) is recorded as a new host plant for Ph. maestingella. A list of points of registrations is given. This species of Lithocolletinae is alien to the fauna, since all representatives of the genus Fagus L. are introduced into Belarus.
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