Bt crops have been grown commercially for more than two decades. They have proven remarkably effective in the control of target insect pests. However, Bt crops can become less effective under various forms of environmental stress. Most studies in this area have considered the effect of environmental stress on Bt insecticidal protein levels or target pest mortality, but not both, resulting in a lack of mechanistic analysis. In this review, we critically examine previous research addressing the impact of environmental stress on the effectiveness of Bt crops. We find that the body of research data is not sufficiently robust to allow the reliable prediction of the performance of Bt crops under extreme climatic conditions.

Bt作物已经商业化种植了二十多年。已证明它们在控制目标害虫方面非常有效。然而，在各种形式的环境压力下，Bt作物的效力可能降低。该领域的大多数研究都考虑了环境胁迫对Bt杀虫蛋白水平或目标害虫死亡率的影响，但并非两者兼而有之，导致缺乏机械分析。在这篇综述中，我们严格地审查了以前的研究，该研究针对环境胁迫对Bt作物有效性的影响。我们发现，大量研究数据不足以使Bt作物在极端气候条件下的性能可靠预测成为可能。