Study on Biological Activity of Extraction from the Root of Stellera chamaejasme

The root of Chinese stellera (Stellera chamaejasme) was a traditional Chinese medicine, which was a toxic plant grown widely in north of China. Since the medium of 1980s, researchers emphasized Chinese stellera as a kind of resource of plant pesticides. The result of bioassay illustrated that the different extracts from root of Chinese stellera possess certain biological activity. 99% larvae of Lymantria dispar refused to feed on the leaves immersed by water extract and SCEE of the root, which caused the 100% larvae death correctively. In the experiment of evaluating toxicity, the larva had 100% corrective mortality after dealing with the extracts 5 d later. The antifeeding effects rates reached 92.39% when the larva of Dendrolimus tabulaeformis was fed on the extract of SCEE with different organic solvents, meanwhile the corrective mortality reached at 100% after 7 d. The different extracts by different organic agents could restrain the growth of Botryosphaeria dothidea in artificial medium, but had no obvious effects on the growth of Fusaruum oxysporum.