Economic thresholds (ETs) are well‐established for defoliation of soybean, Glycine max, and have been updated for many of the newer cultivars; however, there is increasing grower adoption of cultivars with a reduced leaf area index (LAI). It is of theoretical and practical interest to determine low LAI cultivar tolerance to defoliation. We conducted experiments during two consecutive crop seasons (2017/2018 and 2018/2019) using three soybean cultivars (NS 5959 IPRO, NS 5445 IPRO, and DON MARIO 5.8i) and three defoliation levels (0%, 16.7%, and 33.3%) to evaluate the tolerance of reduced LAI soybean cultivars under different defoliation levels.

中文翻译：

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在巴西，低LAI大豆品种的IPM决策的经济门槛是否相同？

大豆（Glycine max）脱叶的经济阈值（ETs）已经确立，并且已针对许多新品种进行了更新。然而，越来越多的种植者采用了叶面积指数（LAI）降低的品种。确定低LAI品种对脱叶的耐受性具有理论和实践意义。我们在三个连续的作物季节（2017/2018和2018/2019）中使用三个大豆品种（NS 5959 IPRO，NS 5445 IPRO和DON MARIO 5.8i）和三个脱叶水平（0％，16.7％和33.3％）进行了实验）以评估在不同的落叶水平下减少的LAI大豆品种的耐性。