In order to evaluate the effect of the cropping pattern applied refuge on arthropod community in Bt rice paddy, the survey was conducted with the block cropping pattern, in which the block of refuge was along side the block of Bt rice, and the mixed cropping pattern, in which rows of refuge was planting within rows of transgenic Bt rice.

In this study, We used transgenic cry1Ab/cry1Ac (Bt) to analyze the yield and economic effeciency of transgenic Bt rice and parental control after spraying pesticides, study the potential resistance of stem borer to transgenic rice, discuss the effect of refuge strategy on resistance delay of rice stem borer to transgenic rice.

This paper studied the effect of prey refuges on the stage-structured predator-prey model with two life stages-immature and mature,and with a mature prey using refuges.