Impacts of transgenic Bt cotton planting history and cropping patterns on development and oviposition of Propylaea japonica Thunberg Prey Responses of Propylaea japonica in Different Instars to Acyrthosiphon pisum under Growth Chamber Condition Predation on Myzus persicae by Propylaea japonica adults with different extents of starvation Predation of Propylaea japonica on Aphis medicaginis