Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Crucial chemical factors of the termiticidal activity of hinoki wood (Chamaecyparis obtusa) III. Contribution of α-terpinyl acetate to the termiticidal activity of hinoki wood.

Abstract

The most termiticidally active substance in hinoki (Chamaecyparis obtusa) wood from a natural forest in Kochi Prefecture was identified as α-terpinyl acetate. This volatile compound easily disappears if stored as wood meal. Most of the termiticidal activity of hinoki wood can be explained by this compound, but other non-volatile cadinols or α-terpineol are also active. The overall termiticidal activity of hinoki wood seems to be both strong but unstable, which is caused by volatile compounds, and weak but with prolonged activity, caused by non-volatile cadinols. The difference in the termiticidal activity among hinoki samples may be caused by relative amounts of these compounds. Therefore, hinoki samples containing large quantities of α-terpinyl acetate are favourable as an anti-termite wood, and α-terpinyl acetate itself could be developed as a termiticidal agent.