Weed management and net returns with transgenic, herbicide-resistant, and nontransgenic cotton (Gossypium hirsutum)

被引:95
作者
Culpepper, AS [1 ]
York, AC [1 ]
机构
[1] N Carolina State Univ, Dept Crop Sci, Raleigh, NC 27695 USA
关键词
Bromoxynil, 3,5-dibromo-4-hydroxybenzonitrile; cyanazine, 2-[[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl]amino]-2-methylpropanenitrile; fluometuron; N; N-dimethyl-N; '-[3-(trifluoromethyl)phenyl]urea; glyphosate; N-(phosphonomethyl)glycine; MSMA; monosodium salt of methylarsonic; acid; pendimethalin, N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine; pyrithiobac, 2-chloro-6-[(4,6-dimethoxy-2-pyrimidinyl)thio] benzoic acid; broadleaf signalgrass; Brachiaria platyphylla; (Griseb.) Nash #(3) BRAPP; common lambsquarters; Chenopodium album L. # CHEAL; jimson-weed; Datura stramonium L. # DATST; large crabgrass; Digitaria sanguinalis (L.) Scop. # DIGSA; pitted morningglory; Ipomoea lacunosa L. # IPOLA; prickly sida; Sida spinosa L. # SIDSP; sicklepod; Senna obtusifolia (L.) Irwin and Barneby # CASOB; smooth pigweed; Amaranthus hybridus L. #; AMACH; cotton; Gossypium hirsutum L. 'Deltapine 51; ' 'Paymaster 1220RR; ' 'Stoneville BXN 47; bromoxynil-resistant cotton; cotton yield; fiber quality; glyphosate-resistant; herbicide-resistant crops; BRAPP; CASOB; CHEAL; DATST; DIGSA; IPOLA; SIDSP;
D O I
10.1017/S0890037X00041956
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Weed management systems were compared in bromoxynil-resistant, glyphosate-resistant, and nontransgenic cotton. A standard system of pendimethalin preplant incorporated (PPI), fluometuron preemergence (PRE), fluometuron plus MSMA early postemergence-directed (POST-DIR), and cyanazine plus MSMA late POST-DIR in combination with cultivation controlled broadleaf signal-grass, large crabgrass, common lambsquarters, jimsonweed, pitted morningglory, prickly sida, sicklepod, and smooth pigweed 98 to 100% late season. Weed control, cotton yield, and net returns were similar when pyrithiobac or bromoxynil plus MSMA postemergence (POST) replaced fluometuron plus MSMA POST-DIR. Fluometuron PRE had little to no effect in bromoxynil systems. Glyphosate POST to three- to four-leaf-stage cotton followed by cyanazine plus MSMA late POST-DIR and cultivation controlled weeds 96 to 100%. Glyphosate POST followed by glyphosate POST-DIR and cultivation controled pitted morningglory and large crabgrass 89 to 90% and other species at least 94%. Yields and net returns at one location were similar for glyphosate applied twice or glyphosate POST followed by cyanazine plus MSMA POST-DIR and the standard system. Pendimethalin plus fluometuron in glyphosate systems did not increase yield or net returns. At a location severely infested with large crabgrass, pendimethalin plus fluometuron in glyphosate systems increased yield 37 to 44% and net returns 85 to 108%, respectively, when glyphosate was applied to cotton at the three- to four-leaf stage, but not if glyphosate was applied to cotton at the one-leaf stage. Yield and net returns were similar when bromoxynil-resistant, glyphosate-resistant, and nontransgenic cotton were treated using the standard system.
引用
收藏
页码:411 / 420
页数:10
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