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首页> 美国卫生研究院文献>other >Control of Glyphosate-Resistant Common Ragweed (Ambrosia artemisiifolia L.) in Glufosinate-Resistant Soybean Glycine max (L.) Merr
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Control of Glyphosate-Resistant Common Ragweed (Ambrosia artemisiifolia L.) in Glufosinate-Resistant Soybean Glycine max (L.) Merr

机译：抗草甘膦的大豆中抗草甘膦的普通豚草（Ambrosia artemisiifolia L.）的控制Glycine max（L.）Merr

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Common ragweed emerges early in the season in Nebraska, USA and is competitive with soybean; therefore, preplant herbicides are important for effective control. Glyphosate has been used as a preplant control option; however, confirmation of glyphosate-resistant (GR) common ragweed in Nebraska necessitates evaluating other herbicide options. The objectives of this study were to (1) evaluate the efficacy of preplant (PP) herbicides followed by (fb) glufosinate alone or in tank-mixture with imazethapyr, acetochlor, or S-metolachlor applied post-emergence (POST) for control of GR common ragweed in glufosinate-resistant soybean; (2) their effect on common ragweed density, biomass, and soybean yield; and (3) the partial economics of herbicide programs. A field experiment was conducted in a grower's field infested with GR common ragweed in Gage County, Nebraska, USA in 2015 and 2016. Preplant herbicide programs containing glufosinate, paraquat, 2,4-D, dimethenamid-P, cloransulam-methyl, or high rates of flumioxazin plus chlorimuron-ethyl provided 90–99% control of common ragweed at 21 d after treatment (DAT). The aforementioned PP herbicides fb a POST application of glufosinate alone or in tank-mixture with imazethapyr, acetochlor, or S-metolachlor controlled GR common ragweed 84–98% at soybean harvest, reduced common ragweed density (≤20 plants m−2) and biomass by ≥93%, and secured soybean yield 1,819–2,158 kg ha−1. The PP fb POST herbicide programs resulted in the highest gross profit margins (US$373–US$506) compared to PP alone (US$91) or PRE fb POST programs (US$158). The results of this study conclude that effective and economical control of GR common ragweed in glufosinate-resistant soybean is achievable with PP fb POST herbicide programs.
机译：豚草在本赛季初出现在美国内布拉斯加州，与大豆竞争。因此，种植前除草剂对于有效控制很重要。草甘膦已被用作种植前防治措施。但是，内布拉斯加州要确认抗草甘膦（GR）常见豚草，就必须评估其他除草剂选择。这项研究的目的是（1）评估种植前（PP）除草剂，然后（fb）草铵膦单独使用或与伊马西比尔，乙草胺或S-异丙甲草胺在出苗后施用（POST）进行罐混的效果，以控制药效。抗草铵膦大豆中的GR普通豚草； （2）它们对普通豚草密度，生物量和大豆产量的影响； （3）除草剂计划的部分经济学。在2015年和2016年，在美国内布拉斯加州盖奇县一个种植有GR普通豚草的种植者田间进行了田间试验。种植前除草剂计划包括草铵膦，百草枯，2,4-D，丁二烯酰胺-P，氯兰舒兰-甲基或高在治疗后21 d（DAT），氟米沙星与氯嘧磺隆的比率可控制普通豚草的90–99％。上述PP除草剂在大豆收获后单独或与咪唑乙草胺，乙草胺或S-异丙甲草胺控制的GR普通豚草在POST施用草铵膦后或单独在罐混物中施用，降低了普通豚草密度（≤20株植物m - 2 ）和生物量≥93％，确保大豆产量为1,819–2,158 kg ha -1 。与单独的PP（91美元）或PRE fb POST方案（158美元）相比，PP fb POST的除草剂方案产生了最高的毛利率（373-506美元）。这项研究的结果得出结论，使用PP fb POST除草剂程序可以实现对草铵膦抗性大豆中GR普通豚草的有效和经济控制。

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