On the Persistence of Populations of Three Adventive Species of the Weevil Genus Otiorhynchus Germ. (Coleoptera, Curculionidae: Entiminiae) on Lilacs (Syringa L.) in St. Petersburg in 2018

In 2018, all the three species of the weevil genus Otiorhynchus Germ.: O. albidus Stierlin, O. asphaltinus Germar, and O. rotundus Marseul, first recorded from St. Petersburg in 2017, were present at approximately the same densities on Syringa vulgaris L. and S. josikaea Jack. in the places where they occurred in 2017.