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Spring Wheat (Triticum aestivum) Cultivar Responses to Trifluralin and Postemergence Herbicides

机译:春小麦(Triticum aestivum)品种对氟乐灵和芽后除草剂的反应

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摘要

Trifluralin is used for weed control in wheat but may reduce vegetative growth and yield. Postemergence (POST) herbicides may cause additional plant stress to trifluralin-stressed wheat. Field studies at Groton, SD in 1991 and 1992 and at Highmore, SD in 1992 evaluated the effects of 2,4-D-amine, difenzoquat, metsulfuron, and a combination of fenoxaprop-ethyl + 2,4-D-ester + MCPA-ester on hard red spring wheat cultivars '2375,' 'Prospect,' and 'Butte 86' seeded in areas treated with preplant incorporated trifluralin either in the spring before seeding (0.56 kg ai/ha) or the previous year (1.12 or 2.24 kg ai/ha). Trifluralin applied alone in the spring, and followed by some POST herbicides, reduced shoot dry weight and grain yield. Trifluralin reduced the yield of Prospect the most and the yield of 2375 the least. Yields of trifluralin-treated wheat were reduced 23% by metsulfuron and 14% by fenoxaprop-ethyl + 2,4-D + MCPA compared to yields of wheat treated with only the respective POST herbicide. Yields were not reduced with any trifluralin-POST herbicide combination when trifluralin was applied a year prior to seeding wheat.
机译:三氟拉林用于小麦的杂草控制,但可能会减少营养生长和单产。出苗后(POST)除草剂可能会对三氟拉林胁迫的小麦造成额外的植物胁迫。分别于1991年和1992年在SD格罗顿进行实地研究,并于1992年在SD的Highmore进行了实地研究,评估了2,4-D-胺,敌苯草胺,甲磺隆以及非诺沙丙乙基+ 2,4-D-酯+ MCPA的组合的影响在播种前的春季(0.56千克活性成分/公顷)或上一年(1.12或2.24)的硬红春小麦品种“ 2375”,“前景”和“比尤特86”播种在使用三氟拉林进行预种植的区域中kg ai / ha)。三氟拉林在春季单独施用,然后再施用一些POST除草剂,可降低枝干重量和谷物产量。三氟拉林使Prospect的收率降低最多,而使2375的收率降低最少。与仅用相应的POST除草剂处理过的小麦相比,甲磺隆将三氟拉林处理过的小麦的产量降低了23%,而将fenoxaprop-ethyl + 2,4-D + MCPA降低了14%。在小麦播种前一年施用三氟拉林时,任何三氟拉林-POST除草剂组合的产量均未降低。

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