Nocturnal-mating

Guides

• Semanotus japonicus

  sugi bark borer, Cryptomeria bark borer

  Semanotus japonicus is a cerambycid beetle native to Japan that attacks living Japanese cedar (Cryptomeria japonica). Larvae feed primarily within the inner bark of trunks, where they are vulnerable to drowning by resin flow. The species exhibits a transitional ecological state between primary and secondary bark borer, requiring adequate host nutrition but lacking defenses against host resin defenses. Adults are relatively sedentary, with limited between-tree movement and nocturnal mating activity concentrated from sunset to sunrise.

  Cerambycidaebark-borerCryptomeriaforest-pestJapancontact-pheromonenocturnal-matinglimited-dispersalprimary/secondary-insect-transition