• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Purple nutsedge (Cyperus rotundus L.) and yellow nutsedge (Cyperus esculentus L.) management with tillage and the herbicides imazapic and imazethapyr.
【24h】

Purple nutsedge (Cyperus rotundus L.) and yellow nutsedge (Cyperus esculentus L.) management with tillage and the herbicides imazapic and imazethapyr.

机译：紫色耕edge（Cyperus rotundus L.）和黄色耕nuts（Cyperus esculentus L.）的耕作以及除草剂imazapic和imazethapyr的管理。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Purple and yellow nutsedge (Cyperus rotundus L. and C. esculentus L.) together, rank fifth in importance among all weeds in the United States. Both of these nutsedge species reduce peanut ( Arachis hypogaea L.) yields by competing for water, light, and nutrients. They also reduce crop quality due to the contamination of harvested peanuts by nutsedge tubers. Due to the prolonged use of herbicides that differentially controlled yellow nutsedge, purple nutsedge has become an even greater problem in southeastern peanut fields. Imazapic (Cadre) and imazethapyr (Pursuit) were the first herbicides to provide effective postemergence purple nutsedge control in peanuts.;Field and greenhouse studies were conducted to determine the effectiveness of imazapic and imazethapyr in controlling purple and yellow nutsedge, and to evaluate the impact these herbicides have on nutsedge tuber production. Tillage was also evaluated as a means of reducing purple nutsedge growth and reproduction. Tilling at two week intervals more than twice in May and June did not result in significantly lower purple nutsedge tuber numbers in July.;Tilling at two week intervals more than three times throughout the season did not significantly reduce tuber numbers by September. Alternating tillage operations with glyphosate applications resulted in the greatest reduction in tuber number, weight, and viability at mid- and late-season sampling dates. In an herbicide screening study conducted for both purple and yellow nutsedge in the field, imazapic applied at the rate of 71g ha−1 early postemergence (EPOST) resulted in the greatest reduction of tuber numbers and tuber dry weights by July and September.;Greenhouse studies indicated that EPOST applications of imazapic and imazethapyr 2 weeks after emergence (WAE) were more effective than those applied to purple and yellow nutsedge 4 and 6 WAE. Foliar-only treatments of purple and yellow nutsedge 2, 4, and 6 WAE provided better shoot control than soil-applied treatments. The greatest control of nutsedge, however, regardless of plant age, was obtained by treating both the foliage and soil. It was determined at the conclusion of a year-long greenhouse study that soil-applied imazapic provided better residual control of purple nutsedge than imazethapyr.
机译：在美国所有杂草中，紫色和黄色的八角茴香（<斜体的> Cyperus rotundus L.和<斜体的C. esculentus L.）的重要性并列第五。这两种有营养的物种都通过争夺水分，光照和养分来降低花生的产量（ Arachis hypogaea L。）。由于收获的块茎污染了收获的花生，它们还降低了作物品质。由于长期使用除草剂，其差异控制了黄色的八角茴香，所以紫色的八角茴香已经成为东南花生田的一个更大的问题。 Imazapic（Cadre）和imazethapyr（Pursuit）是在花生中提供有效的出苗后紫色知母控制的首批除草剂;进行了田间和温室研究，以确定imazapic和imazethapyr在防治紫色和黄色知母中的有效性，并评估了其影响这些除草剂可增加块茎的产量。还对耕作进行了评估，以此作为减少紫色坚果生长和繁殖的一种手段。在5月和6月，每两周间隔两次以上耕作不会导致7月份紫色紫菜块茎的数量显着降低。在整个季节中，每两周间隔超过3次耕作不会显着减少9月的块茎数量。使用草甘膦交替进行耕作操作可最大程度减少季中和后期采样日期的块茎数量，重量和成活率。在针对田间紫色和黄色树篱进行的除草剂筛选研究中，以71g ha -1 出苗后早期施用（EPOST）的剂量施用咪唑吡嗪可最大程度地减少块茎数量和块茎干重温室研究表明，在出苗后两周（WAE）进行伊马替比和咪唑乙烟的EPOST应用要比紫色和黄色坚果4和6 WAE的应用更为有效。紫色和黄色二棱2、4和6 WAE的仅叶面处理比土壤处理提供了更好的枝条控制。然而，无论植物的年龄如何，对叶绿素的最大控制是通过对树叶和土壤的处理来实现的。一项为期一年的温室研究得出的结论是，土壤施用的吡虫菊酯比咪唑乙烟胺能够更好地控制紫nuts。

著录项

  • 作者

    Horrall, Derek Duane.;

  • 作者单位

    University of Florida.;

  • 授予单位 University of Florida.;
  • 学科 Agriculture Agronomy.
  • 学位 Ph.D.
  • 年度 2010
  • 页码 141 p.
  • 总页数 141
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号