在北京和海南岛南繁基地对我国首批转基因棉花株系进行了抗棉铃虫性综合鉴定试验。结果表明，１龄幼虫取食转基因棉株嫩叶校正死亡率达８０％～８５％，幼虫越大死亡率越低。在网室内接虫和田间自然感虫的条件下，蕾铃被害率可控制在２％以下，顶尖被害率控制在１０％以下，部分株系几乎不受危害。转基因抗虫棉花株系表现出对棉铃虫具有很高抗性和控制危害的能力，对棉铃虫的种群密度具有明显的控制作用。 In the Beijing and Hainan Island South Fan base of China’s first batch of transgenic cotton bollworm resistance comprehensive identification test. The results showed that the correct mortality of young leaves of transgenic cotton plants fed on the first instar larvae reached 80% ~ 85%, the higher the larva mortality was. Under the conditions of insect pests in the net room and natural insects in the field, the damage rate of buds can be controlled below 2% and the rate of top damage below 10%, with some strains hardly harmed. Transgenic Bt cotton lines showed a high resistance to cotton bollworm and the ability to control the harm, with clear control of the population density of the cotton bollworm.