This study consisting of six field experiments was conducted in 2018 and 2019 to evaluate the tolerance of four corn hybrids (P9998AM, P9840AM, DKC42-60RIB, and DKC43-47RIB) to the tank mix of tolpyralate + atrazine with a commercial glyphosate formulation. At 1 wk after application (WAA), two corn hybrids (P9998AM and P9840AM) exhibited more injury from tolpyralate + atrazine (2× rate) applied alone and in combination with glyphosate than DKC42-60RIB and DKC43-47RIB; however, all corn hybrids responded similarly with respect to visible injury 2, 4, and 8 WAA, stand loss, and yield. Application of tolpyralate + atrazine or glyphosate + tolpyralate + atrazine at the 2× rate caused greater corn injury (up to 27%) than tolpyralate + atrazine or glyphosate + tolpyralate + atrazine at the 1× rate (up to 8%) at 1 WAA. The addition of commercial glyphosate with tolpyralate + atrazine did not enhance injury symptoms. Results of this study show that there is a wide margin of corn safety with tolpyralate + atrazine applied alone and in combination with a commercial formulation of glyphosate.

中文翻译：

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草甘膦对玉米杂种对甲苯磺隆+阿特拉津耐受性的影响

这项由六项田间试验组成的研究于 2018 年和 2019 年进行，以评估四种玉米杂交种（P9998AM、P9840AM、DKC42-60RIB 和 DKC43-47RIB）对甲苯磺草酸 + 阿特拉津与市售草甘膦配方的桶装混合物的耐受性。在施用后 1 周（WAA），两种玉米杂种（P9998AM 和 P9840AM）表现出比 DKC42-60RIB 和 DKC43-47RIB 单独施用和与草甘膦联合施用的甲苯磺酸+阿特拉津（2 倍率）的伤害更大；然而，所有玉米杂交种对可见损伤 2、4 和 8 WAA、林分损失和产量的反应相似。在 1 WAA 下，以 2 倍率施用甲苯磺酸盐 + 阿特拉津或草甘膦 + 甲苯磺酸盐 + 阿特拉津比以 1 倍率（高达 8%）施用甲苯磺酸盐 + 阿特拉津或草甘膦 + 甲苯磺酸盐 + 阿特拉津造成更大的玉米损伤（高达 27%） . 将商业草甘膦与甲苯磺酸酯 + 阿特拉津一起添加不会增强损伤症状。这项研究的结果表明，单独使用甲苯吡拉酸 + 阿特拉津以及与草甘膦的商业配方组合使用时，玉米的安全性有很大的提高。