New Data on the Ecology of Larinus scabrirostris Faldermann, 1835 (Coleoptera, Curculionidae) in the South of the Russian Far East

This study provides original data on the association of the weevil Larinus scabrirostris Fald. (Coleoptera, Curculionidae) with the Manchurian saw-wort Serratula manshurica Kitag. (Asteraceae) in natural habitats in southern Primorskii Territory (Russian Far East). In the biotopes under study, L. scabrirostris showed selectivity towards S. manshurica over other plants of the family Asteraceae, Carduus acanthoides, Cirsium pendulum, C. setosum, and Saussurea amurensis. Imagines were collected from inflorescences and infructescences of this plant until late August and early September and from inside infructescences, from the early 3rd ten days of August to late September. Larvae pupated in pupal chambers inside S. manshurica from early August and were found until early September. The duration of pupal development was 13 days; complete sclerotization of cuticle occurred approximately 24 h later. The emergence of a new generation of adults from the Manchurian saw-wort was observed from the early 1st third to the late 2nd third of September.

weevil, Larinus scabrirostris, Coleoptera, Curculionidae, Asteraceae, Serratula manshurica, larva, pupa, Primorskii Territory