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美国密西西比州农技推广部门指出,如果百分百种植 Bt 棉而不采取任何抗性治理的措施,棉铃虫两年后便会产生抗性。凡是暴露于 Bt 内毒素的棉铃虫都有产生抗性的机会。棉铃虫在整个生长期都接触 Bt
The Mississippi Department of Agricultural Extension pointed out that cotton bollworm will develop resistance in two years if it is 100% planted with Bt cotton without any resistance control measures. All cotton bollworms exposed to Bt endotoxins have the chance to develop resistance. The cotton bollworm touches Bt throughout the growing season