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Vertical mobility and cotton tolerance to trifludimoxazin, a new protoporphyrinogen oxidase-inhibiting herbicide, in three West Texas soils
Weed Technology ( IF 1.3 ) Pub Date : 2020-08-25 , DOI: 10.1017/wet.2020.95
B. Scott Asher , Peter A. Dotray , Rex A. Liebl , J. Wayne Keeling , Glen D. Ritchie , Theophilus K. Udeigwe , Jacob D. Reed , Kyle E. Keller , Steve J. Bowe , Ryan B. Aldridge , Anja Simon

Trifludimoxazin, a new protoporphyrinogen oxidase–inhibiting herbicide, is being evaluated for possible use as a soil-residual active herbicide treatment in cotton for control of small-seeded annual broadleaf weeds. Laboratory and greenhouse studies were conducted to compare vertical mobility and cotton tolerance of trifludimoxazin to flumioxazin and saflufenacil, which are two currently registered protoporphyrinogen oxidase–inhibiting herbicides for use in cotton, in three West Texas soils. Vertical soil mobility of trifludimoxazin was similar to flumioxazin in Acuff loam and Olton loam soils, but was more mobile than flumioxazin in the Amarillo loamy sand soil. The depth of trifludimoxazin movement after a 2.5-cm irrigation event ranged from 2.5 to 5.0 cm in all soils, which would not allow for crop selectivity based on herbicide placement, because ideal cotton seeding depth is from 0.6 to 2.54 cm deep. Greenhouse studies indicated that PRE treatments were more injurious than the 14 d preplant treatment when summarized across soils for the three herbicides (43% and 14% injury, respectively). No differences in visual cotton response or dry weight was observed after trifludimoxazin preplant as compared with the nontreated control within each of the three West Texas soils and was similar to the flumioxazin preplant across soils. On the basis of these results, a use pattern for trifludimoxazin in cotton may be established with the use of a more than 14-d preplant restriction before cotton planting.

中文翻译:

在德克萨斯州西部的三个土壤中,垂直流动性和棉花对三氟地莫嗪(一种新的抑制原卟啉氧化酶的除草剂)的耐受性

Trifludimoxazin 是一种新的抑制原卟啉原氧化酶的除草剂,目前正在评估其可能用作棉花土壤残留活性除草剂处理,以控制小种子一年生阔叶杂草。进行了实验室和温室研究,以在三个西德克萨斯土壤中比较三氟嘧啶与氟嘧啶和苯嘧磺草胺的垂直流动性和棉花耐受性,这两种目前已注册用于棉花的抑制原卟啉原氧化酶的除草剂。在Acuff 壤土和Olton 壤土中,trifludimoxazin 的垂直土壤流动性与flumioxazin 相似,但在Amarillo 壤质砂土中比flumioxazin 更具流动性。在所有土壤中,2.5 厘米灌溉事件后三氟二恶嗪运动的深度范围为 2.5 至 5.0 厘米,这不允许基于除草剂放置的作物选择性,因为理想的棉花播种深度为 0.6 至 2.54 厘米深。温室研究表明,当对三种除草剂的土壤进行总结时,PRE 处理比种植前 14 天处理更具伤害性(分别为 43% 和 14% 伤害)。与三个西德克萨斯土壤中的每一种土壤中的未处理对照相比,在预种植三氟噻嗪后没有观察到视觉棉花反应或干重的差异,并且与跨土壤的氟咪嗪预种植相似。在这些结果的基础上,可以通过在棉花种植前使用超过 14 天的种植前限制来建立在棉花中使用曲氟地莫嗪的模式。温室研究表明,当对三种除草剂的土壤进行总结时,PRE 处理比种植前 14 天处理更具伤害性(分别为 43% 和 14% 伤害)。与三个西德克萨斯土壤中的每一种土壤中的未处理对照相比,在预种植三氟噻嗪后没有观察到视觉棉花反应或干重的差异,并且与跨土壤的氟咪嗪预种植相似。在这些结果的基础上,可以通过在棉花种植前使用超过 14 天的种植前限制来建立在棉花中使用曲氟地莫嗪的模式。温室研究表明,当对三种除草剂的土壤进行总结时,PRE 处理比种植前 14 天处理更具伤害性(分别为 43% 和 14% 伤害)。与三个西德克萨斯土壤中的每一种土壤中的未处理对照相比,在预种植三氟噻嗪后没有观察到视觉棉花反应或干重的差异,并且与跨土壤的氟咪嗪预种植相似。在这些结果的基础上,可以通过在棉花种植前使用超过 14 天的种植前限制来建立在棉花中使用曲氟地莫嗪的模式。与三个西德克萨斯土壤中的每一种土壤中的未处理对照相比,在预种植三氟噻嗪后没有观察到视觉棉花反应或干重的差异,并且与土壤中的氟霉嗪预种植相似。在这些结果的基础上,可以通过在棉花种植前使用超过 14 天的种植前限制来建立在棉花中使用曲氟地莫嗪的模式。与三个西德克萨斯土壤中的每一种土壤中的未处理对照相比,在预种植三氟噻嗪后没有观察到视觉棉花反应或干重的差异,并且与跨土壤的氟咪嗪预种植相似。在这些结果的基础上,可以通过在棉花种植前使用超过 14 天的种植前限制来建立在棉花中使用曲氟地莫嗪的模式。
更新日期:2020-08-25
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