The Flower Visiting Insect Fauna in the Chestnut Orchards in Ishikawa Prefecture

Abstract

Among the flower-visiting insects of chestnut flowers, the species of Coleoptera were most abundant in number. Especially, the number of individuals of Popillia japonica indicated the tendency of the increase towards late season of the flowering of chestnut. To examine the change of species diversity, index of species diversity by "H" in sample was calculated in flower visiting insect fauna on three ohrchards. Generally, the index of species diversity shows the tendency of the decrease towards late season of the flowering periods.