European Journal of Wood and Wood Products

, Volume 72, Issue 5, pp 651–657 | Cite as

Antitermitic activity of extracts from Chamaecyparis obtusa branch heartwood

  • Takuya Morikawa
  • Tatsuya Ashitani
  • Hisayoshi Kofujita
  • Koetsu Takahashi


The antitermitic activity of extracts from the branch heartwood of Chamaecyparis obtusa (hinoki) against Japanese termites (Reticulitermes speratus) was compared with that of the trunk. Samples of branch and trunk heartwood were extracted with n-hexane, ethyl acetate, and methanol successively. n-Hexane extracts of branch and trunk heartwood were strongly antitermitic, and branch heartwood contained greater quantities of active n-hexane extracts than trunk heartwood. Germacra-1-(10), 5-dien-4β-ol, t-cadinol, α-cadinol, hinokiresinol, and hinokinin were separated from the branch extracts and the termiticidal and antifeedant activity of these compounds was tested by no-choice and dual-choice test methods. The sesquiterpenoids, germacra-1-(10), 5-dien-4β-ol, t-cadinol and α-cadinol were strongly termiticidal. The norlignan hinokiresinol and lignan hinokinin had weak termiticidal, and strong antifeedant and repellent activity. High concentrations of germacra-1-(10), 5-dien-4β-ol and hinokiresinol were present in branch heartwood. These compounds protect hinoki branches from termites and other harmful organisms. Hinoki branch heartwood, which is usually unused, is a potential source of active antitermitic compounds.


Sesquiterpene Antifeedant Activity Harmful Organism Sesquiterpene Compound Termiticidal Activity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The study was supported by LIXIL JS Foundation (Grant-in-Aid for Research 12–85).


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Takuya Morikawa
    • 1
    • 3
  • Tatsuya Ashitani
    • 1
    • 2
  • Hisayoshi Kofujita
    • 1
  • Koetsu Takahashi
    • 1
    • 2
  1. 1.The United Graduate School of Agricultural ScienceIwate UniversityMoriokaJapan
  2. 2.Faculty of AgricultureYamagata UniversityTsuruokaJapan
  3. 3.Sanriku Fisheries Research Center, United Graduate SchoolIwate UniversityMoriokaJapan

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