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本文研究了转 Bt+Cp TI双价抗虫棉双抗 - 14个世代的棉铃虫抗性及其生育后期棉花对棉铃虫的杀虫活力。研究结果表明 4个不同世代的双抗 - 1在苗期、蕾期、开花期和铃期的抗虫性水平相近 ,说明双抗 - 1的棉铃虫抗性能稳定遗传 ;双抗 - 1不同部位叶片抗虫性明显 ,抗性水平与中心 Bt相近 ,也表现出前期抗虫性强后期抗虫性弱的时空表达特性。尽管抗虫性有所下降 ,双抗 - 1在生育后期仍能延缓棉铃虫 1～ 3龄幼虫的生长发育使其不能化蛹羽化并逐渐死亡 ,而在对照苏棉 12号上的 1～ 3龄幼虫能化蛹羽化。田间种植试验也表明双抗 - 1生育后期没有被棉铃虫危害的症状 ,表现出了高抗虫性。
In this paper, we studied the resistance of cotton bollworm (Bt + Cp TI) to cotton bollworm (Bt + CP TI) and the insecticidal activity of cotton (Bt + Cp TI) to cotton bollworm (H. The results showed that the resistance levels of double antibody - 1 in four different generations at seedling stage, bud stage, flowering stage and boll stage were similar, indicating that the resistance of double - antibody - 1 cotton bollworm was stable and stable. The pest resistance of the leaves was obvious, and the resistance level was similar to the center Bt, which also showed the spatiotemporal expression characteristics of early pest resistance and weak pest resistance. In spite of the decreased resistance to insecticides, the double anti-1 can delay the growth and development of the first to third instar larvae of the H. armigera in late growth so that it can not emerge pupae and gradually die. However, in control Sumian 12, 1-3 Age larvae can pupate eclosion. Field planting experiments also showed that the double-anti-1 growth stage did not endanger the symptoms of cotton bollworm, showed high insect resistance.