FORMATION OF THE ENTOMOACAROCOMPLEX OF ORNAMENTAL TREES IN TRANSNISTRIA

The paper has reviewed polyphagous and specialized pests of the most common tree species for Transnistria. 233 species of harmful arthropods have been identified on tree crops in the region, of which 20 % were polyphages. There are seven invasive species among polyphages: Eriosoma lanigerum Hausman, (Lymantria dispar L., Hyphantria cunea Drury, Grapholitha molesta Busck. Carposina niponensis Wism., Metcalfa pruinosa Say и Quadraspidiotus регniciosus Comst. Hardwoods are damaged by 105 species of specialized pests, while coniferous – by 15 species. The largest number of specialized species of phytophages has been recorded on oak. There have not detected any invasive phytophages neither on Fraxinus excelsior, Prunus cerasifera var. pissardii nor on the species of the genera Populus, Acer, Ulmus, Betula, Salix, Pyrus and Padus. Since 2016, oaks have been inhabited by Corythucha arcuata Say, which damages all oak species growing in Transnistria. Phyllonorycter issikii Kumata forms its mines on lime, Caloptilia roscipennela Hbn. – on walnut. Three invasive species develop on false acacia at once: Parectopa robiniella Clemens, Phyllonorycter robiniella Clemens, Obolodiplosis robiniae Hald. A limited number of specialized objects, which are mainly invasive (Corythucha ciliata Say, Cameraria ohridella Deschka et Dimić and Bruchidius terrenus Sharp), have been found on introduced tree species, such as hybrid plane, horse chestnut and silk tree. Among conifers, the pine entomofauna is the richest in species composition. In 2016, new species were identified: Dioryctria abietella Schiff. and Laspeyresia strobilella L. The most dangerous and aggressive pest of spruce is Paratetranychus ununguis Jac., while Physokermes piceae Schr. harms with foci.