The damage index of total leaves on GK-12 is 1.27 times higher than that on SGK321. Thus, the damage of green leaf bug to transgenic Bt cotton, GK-12, is upward, while the population and damage on SGK321 are controlled in some extent.

• 绿盲蝽在单价抗虫棉“GK-12”上的发生为害有加重趋势,而在双价抗虫棉“SGK321”上的发生程度却受到一定抑制。