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CHEMICAL COMPOSITION AND TERMICIDAL ACTIVITY OF SCORODOCARPUS BORNEENSIS BECC BARK EXTRACTS

Abstract

The chemical compositions of the bark extracts of Scorodocarpus borneensis plant extracted successively with ethanol, n-hexane and ethyl acetate was analyzed by GC/GCMS. The preliminary phytochemical screening conducted on the crude bark extracts revealed the presence of alkaloids, triterpenoid, phenolic, flavonoids, steroid and saponin which are known to support the bioactive activities of the plant in folk medicine. The anti-termite activity of S.borneensis of the two extracts from different solvents against Coptotermes curvignathus was evaluated in the present research study. It was found that the ethyl acetate extracts are more toxic than that of n-hexane extract against the C. curvignathus. The result showed that ethyl acetate and n-hexane extracts exhibited termite mortality with LC50 values 0.013% and 0.029%. Anti-feedant index of S.boornensis extract on C. curvignathus was shown that index the n-hexane extract and ethyl acetate C. curvignathus were varied from 0.209%  to 14.041%.  No difference anti-feedant index category for two extract, suggested that the n-hexane and ethyl acetate fraction delivered as toxic to subterranean termites. We hereby report for the first time the major compounds from the n-hexane extracts of S.boornensis  to be 9-octadecenoic acid (36.50%), hexadecanoic acid (16.68%) methyl 9 octadecenate (15.39%) and  octadecanoic acid (4.00%) and  the  ethyl acetate extract showed the existence of beta-methyl glucocide (23.40%), hexadecanoic (15.56%),1, 2-benzenadicarboxylic acid, bis (2-ethyl (hexyl) ester(12.34%), 9-hexadecenoic acid (12.72%), 3-phenyl-2-propenoicacid (7.53%), bezophenone (6.64%), 5-oxymethyl furfurole (4.78%), 9, 12-octadeca-dienoic  acid (3.17%), beta-D-mannofuranoside (2.75%), methyl-m-dioxane (2.23%), hexadedioic acid (2.11%) respectively; all of which contribute individually and or synergistically to the biological activities reported in this study.


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