GC-MS analysis of essential oil of Shorea robusta bast

GC-MS analysis of the essential oil of Shorea robusta bast (cambium + secondary phloem) has revealed the presence of twenty-eight compounds, of which nine compounds, constituting 48.79% of the oil, were identified as T-cadinol (16.75%), alpha-cadinol (16.45%), globulol (4.52%), alpha-copaene (3.79%), gamma-cadinene (2.34%), viridiflorene (1.62%), beta-elemene (1.54%), alpha-terpineol (1.33%) and gamma-muurolene (0.45%). This is the first report on the volatile constituents of the bast which may be significant in influencing host location for Hoplocerambyx spinicornis, the most injurious heartwood borer of Shorea robusta.