Study on Biological Activity of Cestrum nocturnum Linn
ZHU Yao-rong et al(College of Life Sciences,Shaoxing College of Arts and Science,Shaoxing,Zhejiang 312000)
[Objective] The study was to provide the basis for the development and exploitation of the green pesticides of Cestrum nocturnum Linn source and the multi-functional products of C.nocturnum.[Method] The ethanol-extracts of C.nocturnum.was obtained with ultrasonic wave extraction,and the effects of fumigation,repellent and contact toxicity of the extracts on drosophila were studied.[Result] After the drosophilas were fumigated by ethanol-extracts and dilute solution of C.nocturnum for 1 h,they were all dead,which indicated that the ethanol-extracts and dilute solution of C.nocturnum had better repellent effects on drosophila and the repellent effects reached 100% in 30 min.The contact action of dilute solution and ethanol-extracts of C.nocturnum on drosophila were all weak and the contact action only was 10%.When drosophilas were fumigated by ethanol-extracts and dilute solution of C.nocturnum,they had embarrassed.symptom and then gradually lost activity until died,and the fumigation effect reached 100% in 30 min.[Conclusion] The C.nocturnum had better fumigation and repellent effects on drosophila,but its contact action on drosophila was weak.