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1999和 2 0 0 0年的试验结果表明 ,Bt转基因水稻对鳞翅目害虫 (稻纵卷叶螟、二化螟和三化螟等 )具有良好的抗性。但其回交一代随着害虫为害时间延长 ,出现抗性衰退现象
The results from 1999 and 2000 show that Bt transgenic rice has good resistance to lepidopteran pests (rice leaf roller, striped stem borer and rice borer, etc.). However, the backcross generation showed resistance decline as pest infestation prolonged