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. Moreover, in addition to the above introduced communications between two plants, the potential of plant-plant-plant communications, in which there are chain-actions among three plants that play roles of 1) emitter, 2) receiver and then emitter, and 3) receiver, respectively, for the primed defense responses were evaluated.