Response of palmer amaranth (Amaranthus palmeri) accessions to glyphosate, fomesafen, and pyrithiobac
Response of palmer amaranth (Amaranthus palmeri) accessions to glyphosate, fomesafen, and pyrithiobac
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DOI：
10.1614/wt-05-189.1
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发表时间：
2006-10-01
期刊：
影响因子：
1.4
通讯作者：
Stephenson, Daniel O.
中科院分区：
文献类型：
--
作者：
Bond, Jason A.;Oliver, Lawrence R.;Stephenson, Daniel O.
在阿肯色州费耶特维尔进行了田间研究，以确定来自美国南部不同地区的47份紫红色紫红色种质在出苗后对草甘膦异丙胺盐(840g ae/ha)、福美沙芬(420g ai/ha)和吡硫丁酸(70g ai/ha)的注册使用率是否存在差异。草甘膦处理后21d(DAT)，对所有籽粒扬种质的抑制率均在99%以上。用福美沙芬防治籽粒扬对所有供试材料的防效相当，21天的防效至少为96%。草甘膦和福美沙芬的干重减少百分比分别至少为92%和94%。用吡硫杂环丁酸防治紫红色的效果是多种多样的，在20%到94%的21DAT之间，但差异不能归因于加入的来源。在连续使用吡硫杂环丁酸的地区，应使用与吡硫杂环丁酸作用方式不同的除草剂来防治籽粒扬。
Field studies were conducted at Fayetteville, Arkansas, to determine whether 47 Palmer amaranth accessions from different areas of the southern United States varied in response to postemergence applications of the registered rates of the isopropylamine salt of glyphosate (840 g ae/ha), fomesafen (420 g ai/ha), and pyrithiobac (70 g ai/ha). Glyphosate controlled all Palmer amaranth accessions at least 99% 21 d after treatment (DAT). Palmer amaranth control with fomesafen was equivalent for all accessions and at least 96% 21 DAT. Percent dry weight reductions were at least 92 and 94% for glyphosate and fomesafen, respectively. Palmer amaranth control with pyrithiobac was variable and ranged from 20 to 94% 21 DAT, but differences could not be attributed to accession origin. Herbicides with alternate modes of action from pyrithiobac should be utilized for Palmer amaranth control in regions where pyrithiobac has been used continuously.