Antitermitic activities of wood essential oil and its constituents from Chamaecyparis formosensis

作者：Hsu Chia Yun; Lin Chun Ya; Chang Shang Tzen^*

来源：Wood Science and Technology, 2016, 50(4): 663-676.

DOI：10.1007/s00226-016-0811-7

Chamaecyparis formosensis is a species indigenous to Taiwan. Its timber is renowned for excellent durability. The aim of this study was to investigate the antitermitic activities of wood essential oil of C. formosensis and its constituents. Results showed that wood essential oil of C. formosensis had powerful antitermitic activity, with LD50 values of 0.76 mg/g after 7 days of testing. Among the nine fractions of wood essential oil, Fraction 5 showed the strongest antitermitic activity, with LD50 value of < 0.63 mg/g after 7 days of testing. Evidences obtained demonstrated that the antitermitic activity of Fraction 5 was mainly attributed to its constituents, including T-cadinol, T-muurolol, alpha-cadinol and 1-epi-cubenol. In addition, cadinane skeleton compounds with a hydroxyl group exhibited better antitermitic activities than those without hydroxyl groups. These results demonstrated that the effective constituents had the potential to become eco-friendly termite control agents, and characteristics of these chemical structures could serve as references for making synthetic pesticides.

• 出版日期2016-7