Adult Density of the Sugi Bark Borer, Semanotus japonicus LACORDAIRE(Coleoptera:Cerambycidae), in Damaged Stands of Japanese Cedar, Cryptomeria japonica D.DON.

抄録

Adult density of the sugi dark borer, Semanotus japonicus LACORDAIRE (Coleoptera: Ceram-bycidae), was investigated in 60 planted Japanese cedar Cryptomeria japonica D. DON. stands in Mie, Kyoto, Nara and Osaka Prefectures, central Japan. The percentage of damaged trees increased with stand age up to 22 years. Stands which were 10- to 17-years old or with mean tree diameters of 6 cm to 17 cm yielded the highest numbers of adults.