A field study was conducted in 2017 and 2018 to determine foliar efficacy of halauxifen-methyl, 2,4-D, or dicamba applied alone and in combination with glyphosate at preplant burndown timing. Experiments were conducted near Painter, VA; Rocky Mount, NC; Jackson, NC; and Gates, NC. Control of horseweed, henbit, purple deadnettle, cutleaf evening primrose, curly dock, purple cudweed, and common chickweed were evaluated. Halauxifen-methyl applied at 5 g ae ha−1 controlled small and large horseweed 89% and 79%, respectively, and was similar to control by dicamba applied at 280 g ae ha−1. Both rates of 2,4-D—533 g ae ha−1(low rate [LR]) or 1,066 g ae ha−1 (high rate [HR])—were less effective than halauxifen-methyl and dicamba for controlling horseweed. Halauxifen-methyl was the only auxin herbicide to control henbit (90%) and purple deadnettle (99%). Cutleaf evening primrose was controlled 74% to 85%, 51%, and 4% by 2,4-D, dicamba, and halauxifen-methyl, respectively. Dicamba and 2,4-D controlled curly dock 59% to 70% and were more effective than halauxifen-methyl (5%). Auxin herbicides applied alone controlled purple cudweed and common chickweed 21% or less. With the exception of cutleaf evening primrose (35%) and curly dock (37%), glyphosate alone provided 95% or greater control of all weeds evaluated. These experiments demonstrate halauxifen-methyl effectively (≥79%) controls horseweed, henbit, and purple deadnettle, whereas common chickweed, curly dock, cutleaf evening primrose, and purple cudweed control by the herbicide is inadequate (≤7%).

中文翻译：

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2,4-D、麦草畏和halauxifen-methyl单独或与草甘膦组合用于种植前杂草控制的比较

2017 年和 2018 年进行了一项田间研究，以确定在种植前烧毁时间单独施用或与草甘膦联合施用甲基卤代芬、2,4-D 或麦草畏的叶面效力。实验在弗吉尼亚州画家附近进行。落基山，NC；北卡罗来纳州杰克逊；和北卡罗来纳州盖茨。评估了对马草、henbit、紫荆、月见草、卷曲码头、紫逆戟和普通繁缕的防治。以 5 g ae ha 施用的 Halauxifen-methyl-1分别控制了 89% 和 79% 的小型和大型马草，与以 280 g ae ha 施用的麦草畏的控制相似-1. 2,4-D—533 g ae ha 的两种比率-1（低速率 [LR]）或 1,066 g ae ha-1（高比率 [HR]）——在控制马草方面的效果不如甲基氟草醚和麦草畏。Halauxifen-methyl 是唯一能控制 henbit (90%) 和紫荆 (99%) 的生长素除草剂。2,4-D、麦草畏和halauxifen-methyl分别将墨角叶月见草控制在 74% 至 85%、51% 和 4%。麦草畏和 2,4-D 控制的卷曲码头 59% 至 70% 并且比halauxifen-methyl (5%) 更有效。单独施用生长素除草剂可控制紫花苜蓿和普通繁缕 21% 或更少。除了月见草 (35%) 和卷曲月见草 (37%) 之外，单独使用草甘膦即可对所有评估的杂草提供 95% 或更高的控制率。这些实验表明，halauxifen-methyl 可有效 (≥79%) 控制马蹄草、henbit 和紫荆，而普通繁缕、卷曲码头、月见草、