In order to test the olfactory responses of T.hawaiiensis to different host plant volatiles and further explore the host selection and damage mechanism of this pest species,the behavioral responses of T.hawaiiensis to the volatiles of Eustoma grandiflorum,Rhododendron simsii,Lilium brownie and Dendranthema morifolium flowers were studied by Y-type and Four-arm olfactometers.In addition,the components and relative content of the volatiles from the four kinds of flowers were also analyzed by gas chromatography-mass spectrometry(GC-MS).The results showed that female adults of T.hawaiiensis performed steady preference to the flower volatiles (E.grandiflorum>R.simsii>L.brownie>D.morifolium).The volatile components from the four kinds of flowers were analyzed by GC-MS,and there were 38,56,42 and 44 components identified in the volatile profiles of E.grandiflorum,R.simsii,L.brownie and D.morifolium,respectively.2-butenal(47.06%),nonanal(15.21%),trans-β-ocimene(25.16%) and chrysanthenone(30.50%)were separately the most abundant components of the volatiles of E.grandiflorum,R.simsii,L.brownie and D.morifolium.Thus,the different olfactory responses of T.hawaiiensis to the four flowers may be closely correlated with the differences of flower volatiles types and concentrations.