Abstract
The effects of stilbene glucosides and related compounds on termite feeding behavior were investigated using paper disc methods against the subterranean termite Reticulitermes speratus. The stilbene-rich fraction and isorhapontin (3′-methoxy-3,4′, 5-trihydroxystilbene-3-β-d-glucoside) from bark extracts of Picea glehnii showed avoidance by termites in choice tests. In the no-choice tests using compounds purified from the stilbene-rich fraction, the largest feeding deterrent effect was observed for piceid (3,4′,5-trihydroxystilbene-3-β-d-glucoside), followed by isorhapontin, and astringin (3,3′,4′,5-tetrahydroxystilbene-3-β-d-glucoside), at the concentrations from 0.63 to 2.5 µmol/disc. No change in activity was observed at retentions of more than 5.0 µmol/disc. When the activities of isorhapontin and its aglycone derivative (isorhapontigenin: 3′-methoxy-3,4′,5-trihydroxystilbene) were compared with that of taxifolin (3,3′,4′,5,7-pentahydroxyflavanone) in the no-choice test, the stilbenes exhibited a larger antifeedant potential. Methylation of isorhapontigenin increased its termiticidal activity.
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Part of this study was presented at the 32nd Annual Meeting of the International Research Group on Wood Preservation, 2001
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Shibutani, S., Samejima, M. & Doi, S. Effects of stilbenes from bark of Picea glehnii (Sieb. et Zucc) and their related compounds against feeding behaviour of Reticulitermes speratus (Kolbe). J Wood Sci 50, 439–444 (2004). https://doi.org/10.1007/s10086-003-0583-1
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DOI: https://doi.org/10.1007/s10086-003-0583-1