We also found that different bt cottonseeds with different gene have similar pest resistance effects . but bt cottonseeds with different quality have quite different pest resistance effects ; quantity of pesticide use on high quality bt cottonseeds is 5kg less than that on inferior bt cottonseeds , although the latter one is 33kg less than that on non - bt cotton 但是不同種子質(zhì)量的抗蟲棉抗蟲效果相差較大,種植優(yōu)質(zhì)抗蟲棉種子比種植劣質(zhì)抗蟲棉種子的棉農(nóng)每公頃少投入農(nóng)藥5公斤,但劣質(zhì)的抗蟲棉種子也比非bt棉每公頃少投入農(nóng)藥33公斤。