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首页> 外文期刊>Weed Science: Journal of the Weed Science Society of America >Variable Tolerance among Palmer Amaranth (&ITAmaranthus palmeri&IT) Biotypes to Glyphosate, 2,4-D Amine, and Premix Formulation of Glyphosate plus 2,4-D Choline (Enlist Duo (R)) Herbicide
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Variable Tolerance among Palmer Amaranth (&ITAmaranthus palmeri&IT) Biotypes to Glyphosate, 2,4-D Amine, and Premix Formulation of Glyphosate plus 2,4-D Choline (Enlist Duo (R)) Herbicide

机译：Palmer Amaranth（＆amp; Itamanthus Palmeri＆amp; IT）的可变耐受性对草甘膦，2,4-D胺和草甘膦加上2,4-D胆碱（征募二核（R））除草剂的生物型

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Adoption of soybean that is resistant to 2,4-D will result in more use of glyphosate plus 2,4-D premixes and tank mixtures. Preliminary whole-plant greenhouse assays confirm most Palmer amaranth populations found in Indiana are glyphosate-resistant (GR), and some biotypes exhibit tolerance to 2,4-D amine. Dose-response experiments were conducted to determine the level of glyphosate resistance and 2,4-D amine tolerance in four Palmer amaranth biotypes. A premix formulation of glyphosate plus 2,4-D choline was also evaluated. The R1, R2, and R3 biotypes were 31- to 66-fold more resistant to glyphosate (R:S ratio) than the S1 biotype based on the herbicide dose to cause 90% mortality (LD90). The maximum POST rate of the premix formulation of Enlist Duo (R) labeled in 'Enlist (R) soybean is 2,195 g ae ha(-1). When separated by active ingredient, the maximum POST rate of Enlist Duo (R) is equivalent to 1,141 and 1,054 g ae ha(-1) of glyphosate and 2,4-D choline, respectively. In the absence ofyphosate, the maximum rate of 2,4-D (1,054 g ae ha(-1) ) in the premix formulation of Enlist Duo (R) controlled S1, R2, and R3 biotypes, but failed to control all plants from the R1 biotype. Estimates for LD90 showed the R1 biotype was 3-fold more tolerant than the S1 biotype to 2,4-D amine. However, no plants survived the 1,155 g ae ha(-1) (600 g ae ha(-1) of glyphosate plus 555 g ae ha(-1) 2,4-D) treatment with the premix formulation of glyphosate plus 2,4-D choline. Overall, results from this experiment suggest GR Palmer amaranth that also exhibits increased tolerance to 2,4-D amine will be difficult to control with glyphosate or 2,4-D alone, but can be controlled POST with Enlist Duo (R) at lower than labeled field rates (1,618 to 2,195 g ae ha(-1)).
机译：采用耐药耐药耐药耐药率为更多使用草甘膦加2,4-D预混物和罐混合物。初步全植物温室测定确认在印第安纳州发现的大多数帕拉特·苋属种群是抗草甘膦（GR），一些生物型在2,4-D胺表现出耐受性。进行剂量 - 反应实验以确定四个Palmer Amanth生物型的草甘膦抗性和2,4-D胺耐受水平。还评估了草甘膦加2,4-D胆碱的预混物。 R1，R 2和R3生物型比基于除草剂剂量的S1生物型耐抗草甘膦（R：S比率），r1，r2和r3生物型在31-至66倍。引起90％死亡率（LD90）。在'in inrist（r）大豆中标记的in in in in in in in in in的最大级率为2,195g ae ha（-1）。当通过活性成分分离时，Inlist Duo（R）的最大率分别相当于草甘膦和2,4-D胆碱的1,141和1,054g Ae Ha（-1）。在没有苯甲酸盐的情况下，预混配制的2,4-D（1,054g Ae Ha（-1））的最大速率在Inlist Duo（R）控制的S1，R2和R3生物型中，但未能控制所有植物R1生物型。 LD90的估计显示R1生物型比S1生物型至2,4-D胺更耐受3倍。然而，没有植物存活的1,155g ae ha（-1）（600g aeh（-1）草甘膦加555g ae ha（-1）2,4-d）用premphosate plus 2的预混制剂处理， 4-D Choline。总体而言，该实验的结果表明GR Palmer AmarantH，也表现出对2,4-D胺的耐受性增加的耐受性将难以用草甘膦或2,4-D控制，但可以在较低的征兵中控制职位而不是标记的场速率（1,618至2,195g Ae ha（-1））。

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