Confirmation and control of glyphosate-resistant Palmer amaranth (Amaranthus palmeri) in Arkansas
Confirmation and control of glyphosate-resistant Palmer amaranth (Amaranthus palmeri) in Arkansas
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DOI：
10.1614/wt-07-128.1
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发表时间：
2008-01-01
期刊：
影响因子：
1.4
通讯作者：
Oliver, Lawrence R.
中科院分区：
文献类型：
--
作者：
Norsworthy, Jason K.;Griffith, Griff M.;Oliver, Lawrence R.
2005年6月，密西西比县的阿肯色州首次报道了草甘膦未能控制帕尔默阿马兰斯。本研究的目的是（a）确认阿肯色州的抗草甘膦Palmer阿马兰斯，和（B）确定15种芽后施用的除草剂的有效性，所述除草剂包括与草甘膦敏感的加入相比控制抗草甘膦生物型的8种作用模式。LD 50值是相似的三个敏感的帕尔默阿马兰斯加入，范围从24.4至35.5克ae/公顷草甘膦。抗性生物型的草甘膦LD 50为2，820 g/ha，是敏感生物型的79- 115倍，是正常草甘膦使用率840 g/ha的3.4倍。草甘膦抗性生物型有效地控制与大多数评估的除草剂，但使用乙酰乳酸脱氢酶抑制剂除草剂，如吡硫菌酸，三氟甲磺隆，和咪唑乙烟酸是不是一个可行的选择，控制这帕尔默阿马兰斯种群。
Failure of glyphosate to control Palmer amaranth was first reported in Arkansas in Mississippi County in June, 2005. The objectives of this research were to (a) confirm glyphosate-resistant Palmer amaranth in Arkansas, and (b) determine the effectiveness of 15 postemergence- (POST) applied herbicides comprising eight modes of action in controlling the glyphosate-resistant biotype compared to glyphosate-susceptible accessions. The LD50 values were similar among three susceptible Palmer amaranth accessions, ranging from 24.4 to 35.5 g ae/ha glyphosate. The resistant biotype had an LD50 of 2,820 g/ha glyphosate, which was 79- to 115-fold greater than that of the susceptible biotypes and 3.4 times a normal glyphosate-use rate of 840 g/ha. The glyphosate-resistant biotype was effectively controlled with most of the evaluated herbicides, but the use of acetolactate synthase-inhibiting herbicides such as pyrithiobac, trifloxysulfuron, and imazethapyr is not a viable option for control of this Palmer amaranth population.