Cry1Ac resistant population with 5.4 fold to Cry1Ac caused 3.7 fold cross resistance to Cry1Ac+1C, no cross resistance to Btk, Bta, and Cry2A.

• 结果表明 :停止汰选后 ；Bt棉叶汰选种群对 Cry1Ac的抗性指数为 5.；9倍；对Cry1Ac+1C的交互抗性为 3