First Finding of Alien Species Nematus tibialis Newman, 1873 (Hymenoptera: Tenthredinidae) in the South of the Russian Far East

摘要

In the south of the Russian Far East, an alien North American species Nematus tibialis Newman, 1873 was registered for the first time. The insect develops on the main food plant, Robinia pseudoacacia L., cultivated in the settlement of Gorno-Taezhnoye and in the arboretum of the Gorno-Taezhnaya Station of the Federal Scientific Center of the East Asia Terrestrial Biodiversity, Far Eastern Branch, Russian Academy of Sciences. The degree of damage is small; one larva is localized on the leaf. There is no decrease in decorativeness. Nevertheless, because of the fairly widespread use of Robinia pseudoacacia in the landscaping of the region, further spread of its phytophage Nematus tibialis is possible. To assess the spread of the pest in the south of the Far East and evaluate the harm it causes, it is necessary to monitor plantations of Robinia pseudoacacia in other settlements of the region.