In our experiments, dicotyledon and monocotyledon crops (bean and maize, respectively) were used as receiver plants exposed to transgenic-plant-emitted volatiles [(E)-b-ocimene] under continuous air flow in open-flow chambers. In addition, greenhouse-based studies were similarly conducted in semi-natural conditions without climate control to assess the ability of inter- plant communication using transgenic plants for pest control. Such greenhouse trials with transgenic plants and the comparison of results with lab studies should be very useful for understanding the features of transgenic-plant-based pest control.