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Abstract
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%), α-cadinol (16.45%), globulol (4.52%), α-copaene (3.79%), γ-cadinene (2.34%), viridiflorene (1.62%), β-elemene (1.54%), α-terpineol (1.33%) and γ-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.
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Acknowledgements
The authors are thankful to the Director, Forest Research Institute (F.R.I), Dehra Dun for encouragement. Thanks are also due to Mr R.S. Bhandari, Entomologist, Forest Entomology Division, FRI, Dehra Dun for providing the plant material. One of the authors (VKV) is thankful to DG, ICFRE for deputing him on a three months training at Cardiff University, Cardiff, UK. Sincere thanks are also due to Dr D.R. Kelly (Chemistry Department, Cardiff University, Cardiff, UK) for his kind cooperation in the GC-MS studies.