Fig. 1From: Efficiency of cotton bollworm (Helicoverpa armigera Hübner) control of different Bt cotton varieties in North ChinaThe planting pattern of Bt cotton with other crops in the different locations (a to e). a The intercropping of Bt cotton and watermelon. b Bt cotton adjacent peanuts. c Bt cotton adjacent corn. d Bt cotton adjacent peppers. e Bt cotton adjacent sorghumBack to article page