Dispersal of adult sugi bark borers, Semanotus japonicus Lacordaire, in an artificial sugi forest.
Semanotus japonicus has become a major pest of sugi (Cryptomeria japonica) and hinoki (Chamaecyparis obtusa) in recent years. Mark-and-recapture censuses of the adult population of the borer were conducted between 1986 and 1987 in a forest plantation in Japan that had been severely damaged by this insect, to clarify the characteristics of within-forest dispersal of adults which may be responsible for reproduction success. The study indicated that females were more active than males, and that both males and females settled in both living and dead trees at high rates, although greater numbers settled in living trees than dead ones. [English captions].