Abstract Recommendations to manage the impact of Spodoptera frugiperda (Lepidoptera: Noctuidae) to maize production include the use of Bt crops where approved, combined with the adoption of integrated pest management (IPM) and insect resistance management (IRM) practices. This study evaluated the efficacy of Bt maize expressing proteins Cry1F + Cry 1A.105 + Cry2Ab2 + Vip3Aa20 to control S. frugiperda under field conditions in Brazil. This Bt maize technology effectively managed seedling cutting injury, significantly reduced foliar feeding and achieved near 100% protection from kernel-feeding caused by both a Cry1F-resistant strain and a field-collected population of S. frugiperda. Consistent field-collected data across several years and planting regions suggest that this Bt maize technology will be an important tool for the effective management of all important feeding injury types caused by S. frugiperda in Brazil. As with any Bt maize hybrid, its implementation within IPM and IRM practices should help growers maintain maize crop sustainability in Brazil.

中文翻译：

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表达 Cry1F、Cry1A.105、Cry2Ab2 和 Vip3Aa20 蛋白的苏云金芽孢杆菌 (Bt) 玉米在防治巴西秋粘虫（鳞翅目：夜蛾科）方面的功效

摘要 管理草地贪夜蛾（鳞翅目：夜蛾科）对玉米生产影响的建议包括在获得批准的情况下使用 Bt 作物，并结合采用综合虫害管理 (IPM) 和昆虫抗性管理 (IRM) 做法。本研究评估了 Bt 玉米表达蛋白 Cry1F + Cry 1A.105 + Cry2Ab2 + Vip3Aa20 在巴西田间条件下控制草地贪夜蛾的功效。这种 Bt 玉米技术有效地控制了幼苗扦插损伤，显着减少了叶面摄食，并实现了近 100% 的保护免受 Cry1F 抗性菌株和田间采集的草地贪夜蛾种群造成的籽粒喂养。几年和种植区的一致田间收集数据表明，这种 Bt 玉米技术将成为有效管理巴西草地贪夜蛾引起的所有重要饲养损伤类型的重要工具。与任何 Bt 玉米杂交种一样，其在 IPM 和 IRM 实践中的实施应有助于巴西种植者保持玉米作物的可持续性。