填空题

Among all the GM crops, Bt genes have proved most effective in ______ when the largest reduction in pesticide use has been reported.

【参考答案】

cotton

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填空题

Rice is one. of the major GM crops containing genes which help to either resist insect or tolerate weed - killing herbicides.

填空题

Study done in Swiss and Cornell University indicated that Bt crops could’ have unreasonable adverse effects on insects in the field.