Insecticide application and classical breeding strategy are not efficient approaches to control the damage of insect because of high investment and contamination of environment for chemical compound, and no high resistance gene in upland cotton varieties. The development of plant molecular biology has enabled breeders to transfer insect resistance genes such as Bt and Cowpea trypsin inhibitor gene (CpTI) into cotton. Planting transgenic Bt varieties was approved to be an efficient way to solve th...