27 Increasing tolerance to Cry 1Ac cotton from cotton bollworm, Helicoverpa armigera , was confirmed

 Li, G., K. Wu, F. Gould, J. Wang, J. Miao, X. Gao, Y. Guo. 2007. Increasing tolerance to Cry 1Ac cotton from cotton bollworm, Helicoverpa armigera , was confirmed in Bt cotton farming area of China . Ecological Entomology 32:366-375.

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