島根県三瓶山におけるトウコマツナギの訪花昆虫群集

Indigorera bungeana, a leguminous shrub native to China and Temperate East Asia is used for revegetation of road-cut slopes, by the appreciation of seeding in Japan. The use of exotic species is to be commercially beneficial, but concerns have been raised about the environmental risk of the naturalization of them. In this study, the survey of insects on the flowers of I. bungeana, growing on a road-cut slope was conducted at Mt. Sanbe in Shimane Prefecture. A total of 488 individuals of insects belonging to 31 species in 11 families were collected. The dominant flowervisiting species in terms of abundance were Halictus aerarius, Tetraloniealla mitsukurii, Megachile spissula, Sphaerophoria spp, and Ceratina flavipes. Among them, H. aerarius is likely to be the most effective pollinator for I. bungeana at the studied site.