By testing the dose death rate regression with different types of commercial Bt products (Dipel and Xentari) before and after the selection, it was found that cross resistance among different types of commercial Bt products was insignificant.

• 对 Bt毒蛋白抗性品系筛选前后分别测定了其不同菌系 (商品制剂Dipel和 Xentari)的剂量 -死亡率回归线 ,发现Bt毒蛋白抗性品系与其不同菌系间不存在明显的交互抗性