ANTITERMITIC COMPOUNDS FROM THE HEARTWOOD OF SONOKELING WOOD (Dalbergia latifolia Roxb.)
This study was undertaken primarily to isolate and identify antitermitic substances that may be responsible for the natural durability of sonokeling wood (Dalbergia latifolia Roxb.). The woodmeal of the samples were extracted with acetone solvent. The acetone extract was then fractionated into n-hexane soluble fraction, ether soluble fraction, and insoluble fraction. The antifeedant bioassay test was carried-out by treating paper discs with extracts at three level of concentration i.e., 0.1 %, 0.5 %, and 1.0 % (W/W). The antifeedant bioassay test showed that both n-hexane soluble fraction and ether soluble fraction of this wood exhibited high toxicity to subterranean termite reticulitermes speratus Kolbe. The toxicity of these soluble fractions need further investigation of the ether soluble fraction led to the isolation and identification of main compound, namely latifolin and new neoflavonoid.