Control of Volunteer Glyphosate-Resistant Cotton in Glyphosate-Resistant Soybean1
Control of Volunteer Glyphosate-Resistant Cotton in Glyphosate-Resistant Soybean1
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DOI：
10.1614/wt-03-073r1
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发表时间：
2004-09
期刊：
影响因子：
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通讯作者：
A. C. York;A. M. Stewart;P. Vidrine;A. Culpepper
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文献类型：
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作者：
A. C. York;A. M. Stewart;P. Vidrine;A. Culpepper
棉铃象鼻虫已从美国棉花带的大部分地区根除。消灭后，有必要采取遏制措施，以发现和消灭重新引入的棉铃象鼻虫。棉花以外的作物没有监测棉铃象鼻虫，因此，在抗草甘膦（GR）棉花大豆中的自愿棉花上的果实可以为棉铃象鼻虫提供产卵场所，并允许昆虫在未被发现的情况下积聚。在五个地点进行了一项实验，以评估GR大豆上常用的除草剂对GR棉花的控制和棉花果实产量的减少。棉花控制芽前（PRE）或芽后（POST）除草剂单独是不一致的各地。施用PRE的45 g有效成分/ha的氟啶磺草胺、137 g有效成分/ha的灭草喹和360 g有效成分/ha的嗪草酮加60 g有效成分/ha的氯嘧磺隆控制棉花55 - 100%，并使棉花果实产量减少84 - 100%。167克有效成分/公顷的甲磺草胺加34克/公顷的氯嘧磺隆PRE控制了50 - 91%的棉花，减少了48 - 98%的果实。420 g/ha的嗪草酮PRE控制棉花23 - 97%，减少果实32 - 100%。30克有效成分/公顷的氟啶虫酸、35克有效成分/公顷的2，4-DB二甲胺盐、12克有效成分/公顷的氯嘧磺隆和420克有效成分/公顷的氟磺胺草醚钠盐与草甘膦混合并施用后处理，控制棉花48 - 100%，减少果实产量67 - 100%。氯酯磺草胺在12或18克有效成分/公顷控制棉花3至66%，并减少果实产量5至85%。棉花控制和果实减少是最大的，最一致的顺序应用嗪草酮加氯嘧磺隆前，其次是氯嘧磺隆，氟胺酸，氟磺胺草醚，或2，4-DB后。这些处理在所有地点控制了至少95%的棉花。棉花果实在三个地点完全消失，在第四个地点减少了至少97%。名称：氯嘧磺隆;氯硝磺草胺; 2，4-DB;氟嘧磺草胺;氟氯灭酸;氟磺胺草醚;草甘膦;嗪草酮;甲磺草胺;棉花（Gossypium hirsutum L.）“DP 422 B/RR”、“PM 1218 B/RR”;大豆，Glycine max（L.）Merr. 'A5353RR'，'A5802RR'，'A5901RR'.附加索引词：棉铃象虫根除、氯嘧磺隆、氯酯磺草胺、氟嘧磺草胺、氟胺酸、氟磺胺草醚、嗪草酮、产卵地点、甲磺草胺、2，4-DB。缩写：DAP，种植后天数; GR，草甘膦抗性; POST，出苗后; PRE，出苗前。
Cotton boll weevil has been eradicated from much of the U.S. Cotton Belt. After eradication, a containment program is necessary to detect and destroy reintroduced boll weevils. Crops other than cotton are not monitored for boll weevil, hence fruit on volunteer glyphosate-resistant (GR) cotton in GR soybean could provide oviposition sites for boll weevils and allow the insects to build up undetected. An experiment was conducted at five locations to evaluate control of GR cotton and reduction in cotton fruit production by herbicides commonly used on GR soybean. Cotton control by preemergence (PRE) or postemergence (POST) herbicides alone was inconsistent across locations. Flumetsulam at 45 g ai/ha, imazaquin at 137 g ai/ha, and metribuzin at 360 g ai/ha plus chlorimuron at 60 g ai/ha applied PRE controlled cotton 55 to 100% and reduced cotton fruit production 84 to 100%. Sulfentrazone at 167 g ai/ha plus chlorimuron at 34 g/ha PRE controlled cotton 50 to 91% and reduced fruit 48 to 98%. Metribuzin PRE at 420 g/ha controlled cotton 23 to 97% and reduced fruit 32 to 100%. Flumiclorac at 30 g ai/ha, 2,4-DB dimethylamine salt at 35 g ae/ha, chlorimuron at 12 g ai/ha, and the sodium salt of fomesafen at 420 g ai/ha mixed with glyphosate and applied POST controlled cotton 48 to 100% and reduced fruit production 67 to 100%. Cloransulam at 12 or 18 g ai/ha controlled cotton 3 to 66% and reduced fruit production 5 to 85%. Cotton control and fruit reduction were greatest and most consistent with sequential applications of metribuzin plus chlorimuron PRE followed by chlorimuron, flumiclorac, fomesafen, or 2,4-DB POST. These treatments controlled cotton at least 95% at all locations. Cotton fruit was totally eliminated at three locations and reduced at least 97% at a fourth location. Nomenclature: Chlorimuron; cloransulam; 2,4-DB; flumetsulam; flumiclorac; fomesafen; glyphosate; metribuzin; sulfentrazone; cotton, Gossypium hirsutum L. ‘DP 422 B/RR’, ‘PM 1218 B/RR’; soybean, Glycine max (L.) Merr. ‘A5353RR’, ‘A5802RR’, ‘A5901RR’. Additional index words: Boll weevil eradication, chlorimuron, cloransulam, flumetsulam, flumiclorac, fomesafen, metribuzin, oviposition sites, sulfentrazone, 2,4-DB. Abbreviations: DAP, days after planting; GR, glyphosate-resistant; POST, postemergence; PRE, preemergence.