Application timing affects BAY MKH 6561 and MON 37500 efficacy and crop response in winter wheat
Application timing affects BAY MKH 6561 and MON 37500 efficacy and crop response in winter wheat
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DOI：
10.1614/0890-037x(2002)016
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发表时间：
2002-10-01
期刊：
影响因子：
1.4
通讯作者：
Miller, SD
中科院分区：
文献类型：
--
作者：
Geier, PW;Stahlman, PW;Miller, SD
在1998年至1999年，1999年至2000年，或2000年至2001年冬小麦生长季节期间，在堪萨斯和怀俄明州的四个地点进行了田间试验，以比较BAY MKH 6561和MON 37500在四个出苗后时间的杂草控制和作物反应。1999年和2001年，在堪萨斯州海斯，当在早秋出苗后（EFP）、晚秋出苗后（LFP）、早春出苗后（ESP）或晚春出苗后（LSP）施用BAY MKH 6561（45 g ai/ha）和MON 37500（35 g ai/ha）时，控制了95%或更多的作弊。在曼哈顿，堪萨斯州，在这些年里，作弊控制是98至100%，除了MON 37500（83至90%）应用LSP。在怀俄明州海斯、阿彻和托灵顿，由于施用时间推迟，用BAY MKH 6561或MON 37500对雀麦的控制下降。对不同除草剂的平均防效，EFP处理对绵雀麦的防效为38 ~ 95%，LSP处理为10 ~ 79%。晚季小麦矮化是11%或更少，无论除草剂治疗，每年在曼哈顿，没有晚季伤害是可见的海斯，阿彻，或托灵顿。1999年或2001年在曼哈顿，2000年在阿彻，1999年在海斯，处理和未处理小麦的产量没有差异。2001年在海斯和托灵顿，接受BAY MKH 6561 EFP的小麦比接受MON 37500 LSP的小麦多产8%的谷粒。在这两个地点，所有除草剂处理的小麦比未处理的小麦多产10%至20%的谷物。
Field experiments were conducted at four locations in Kansas and Wyoming during the 1998 to 1999, 1999 to 2000, or 2000 to 2001 winter wheat-growing seasons to compare BAY MKH 6561 and MON 37500 at four postemergence timings for weed control and crop, response. BAY MKH 6561 at 45 g ai/ha and MON 37500 at 35 g ai/ha controlled cheat 95% or more when applied early-fall postemergence (EFP), late-fall postemergence (LFP), early-spring postemergence (ESP), or late-spring postemergence (LSP) at Hays, KS, in 1999 and 2001. At Manhattan, KS, in these years, cheat control was 98 to 100%, except for MON 37500 (83 to 90%) applied LSP. Downy brome control with BAY MKH 6561 or MON 37500 declined as application timing was delayed at Hays, Archer, WY, and Torrington, WY. Averaged over herbicides, downy brome was controlled 38 to 95% when herbicides were applied EFP and 10 to 79% when applied LSP. Late-season wheat stunting was 11% or less, regardless of herbicide treatment, at Manhattan each year; no late-season injury was visible at Hays, Archer, or Torrington. Yields did not differ between treated and untreated wheat at Manhattan in 1999 or 2001, at Archer in 2000, or at Hays in 1999. Wheat receiving BAY MKH 6561 EFP yielded 8% more grain than did wheat treated with MON 37500 LSP at Hays in 2001 and at Torrington. At these two locations, all herbicide-treated wheat yielded 10 to 20% more grain than did the untreated wheat.