This project resolved two long-standing anomalies regarding Cry2Ab resistance in H. armigera.

Cotton aphid and two-spotted mite have the potential to cause dramatic reductions in the yield and fibre quality of cotton. Management of these pests is strongly dependent on insecticides and acaricides.

Key factors in managing transgenic Bt cottons for the future are to have an effective resistance management strategy. An essential component of any such strategy is to establish a resistance monitoring program.