Secondary metabolites released from tobacco manipulated the orientation and oviposition behaviors of pest insects and attracted natural insects to some pests.The major cuticular components of tobacco leaves were extracted by rinsing the leaves with dichloromethane and collecting tobacco plant volatiles by headspace absorption,and the components were analyzed by GC/MS.The results indicated that 36 compounds were identified from the tobacco leaves,33 compounds at vigorous growing stage,31 compounds at mature ...