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转Ｂｔ基因抗虫棉Ｒ１９品系对棉铃虫有明显的抗性。饲喂５个抗虫棉株系盛花期叶片５天后，初孵棉铃虫幼虫的死亡率为５６．７％，对照泗棉３号和太１９３两个常规推广品种初孵幼虫的死亡率分别为２１．１％和１８．４％。转Ｂｔ基因抗虫棉Ｒ１９叶片能显著延缓棉铃虫的发育进程，饲喂Ｒ１９叶片５天后，存活幼虫以２龄虫为主；饲喂泗棉３号叶片５天后，存活幼虫以３龄虫为主。Ｒ１９盛花期对棉铃虫的抗性可能受一对显性主基因控制。
Bt transgenic Bt cotton R19 strains have obvious resistance to cotton bollworm. The mortality of newly hatched cotton bollworm larvae was 56.7% after feeding five insect-resistant cotton plants at full-flowering leaves for 5 days. The mortality of newly hatched larvae in two conventional popularized varieties, ie Simian 3 and Tai 193, were 21.1% and 18.4%. Transgenic Bt transgenic cotton R19 leaves significantly delayed the development of cotton bollworm. After feeding R19 leaves for 5 days, the second instar larvae were the main survival larvae. After feeding Simian No.3 leaves for 5 days, the Lord. The resistance of R19 to cotton bollworm at full flowering stage may be controlled by a pair of dominant major genes.