Study on allelopathic effects of volatile oil in Artemisia scoparia

This paper studied the allelopathy effects and chemical compositions of Artemisia scoparia volatile oil. The results showed that volatile oil has different inhibition effects on seeds germination and seedling growth of radish, Lucerne, Chinese cabbage and maize. In comparison with control, seed germination of radish decreased by 27.3%, while root and seedling of Lucerne growth were reduced by 19.2% and 33.4%, respectively. Chemical analysis of the volatile oil was performed by means of GCMSDS. 38 chemical components was identified .The content of the identified compounds made up 87.53% of the total substances detected, including 12 terpenoids compounds, 45.04% of the total substances detected. The relative contents of chemical components more than 1.5% were identified as: 1） 2,5Etheno4，2，2propella3,7,9triene； 2）Spathulenol； 3）Caryophyllene；4）Benzene, 1,2dimethoxy4(2propenyl)； 5）Caryophyllene oxide； 6）Capillin； 7）Trans Nerolidol；8）BetaFarnesene； 9） Benzene,1(1,5dimethyl4hexenyl)4methyl； 10） Germacrene.