Study On The Five Landscape Plants Such As Tagetes Patula Durango Against Mosquitoes And Identification The Components Of The Volatile

In this study,50 lanndscape plants were dealed with the effect of repelling against the mosquitoes.The chemical components of volatile oil were identified,which provides scientific basis for the utilization of this plant species in gardens.After analyzing this data some conclusions were drawn as follow:Olfactory responses of mosquitoes to the 50 lanndscape plants were investigated in the laboratory using a Y-tube olfactomete.The data showed that 5 plant were effective,i.e. Platycladus orientalis(L.)Franco,Tagetes patula,Mentha arvenssis,Pelargonium citrosum Vanleenii and Lycopersicon esculentum.The mosquitoes repellent effect of 5 plant were also tested under laboratory conditions.The rate of repellent is above 50%in 15mins.However,the effect waked as the time goes by.In addition,the effect of different plant were varied.In a short time, Platycladus orientalis and Lycopersicon esculentum were the most effective.Compared with other plant,the repellent effect of Tagetespatula were identified after 30 min.The chemical components of volatile oil of the 5 plant were determined qualitatively and quantitatively by gas chromatograph-mass spectrometry-computer(GC/MS).It showed that Cyclofenchene have been found in all volatile oil.Phellandrene, terpinolene,Limonene,D-Carvone and Caryophyllene were the main components.Through the investigation of 150 people,the conclusion showed that mosquitorepellent incense had been the main method to repel mosquitoes.However,the price and the security were main factor when people choosing mosquito-repellent goods.It also showed that 65%people were ready to utilizing plant to repel mosquitoes,and the price people accept wasï¿¥20.