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(A–C) Moths trapped in cotton fields (%) that originated from non-cotton host plants. Remaining moths (100 –% indicated by bar) originated from cotton. Moths were trapped at three locations (Guider, Djalingo, and Tcholliré) in Cameroon in 2006. (D) Typical sequence of Helicoverpa armigera host plants in the West Africa cotton belt throughout the cropping season. Curves represent temporal occurrence and relative area of host plants.
