To clarify the effects of Bt maize and two shelter strategies on target pests and yield,Double Resis-tance 12-5 and its non-Bt control Hongshuo899 were planted by strip block refuges,C0030.3.5 and its control C00 10.1.1 were planted by seed mixtures.The results showed that Ostrinia furnacalis and Helicoverpa armigera were the dominant pests.There was no significant difference in the number of pests between strip blocks and seed mixtures.Strip blocks and seed mixtures had obvious control effect on the pests.The number of pests in different growth period of four maize hybrids was significantly different.No pests were found in V6-V10,while there was the highest number in R3-R6,Bt maize has a good control effect on target pests,the control effect was above 87.04％.Double resistance 12-5 and C0030.3.5 could increase maize yield above 10.24％and 8.41％.Bt maize with strip blocks and seed mixtures has a good effect on controlling pests and increasing yield.
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