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首页> 外文学位 >Control of spring weed vegetation with saflufenacil.
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Control of spring weed vegetation with saflufenacil.

机译：用苯氟磺草胺控制春季杂草植被。

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摘要

Field and greenhouse studies were conducted in 2007 and 2008 to evaluate the foliar efficacy of saflufenacil on horseweed (Conyza canadensis (L.) Cronq.). In the field, saflufenacil applied alone at the lowest rate (25 g/ha) resulted in less control than all other herbicide treatments that included saflufenacil. The addition of glyphosate to 25 g/ha of saflufenacil increased the level of control over either herbicide applied alone. However, the addition of glyphosate to 50 g/ha of saflufenacil or greater was not beneficial because saflufenacil alone provided at least 95% control. Overall, horseweed height at the time of herbicide application had very little effect on the efficacy of saflufenacil applied alone or in combination with glyphosate.;Application variables can enhance the foliar activity of saflufenacil. In the greenhouse, saflufenacil combined with glyphosate provided greater control than saflufenacil applied alone on both glyphosate-susceptible and --resistant horseweed populations. Regardless of horseweed population or glyphosate, saflufenacil had greater activity when crop oil concentrate rather than nonionic surfactant was used as the adjuvant. Decreasing light level within 24 hours of herbicide application resulted in greater saflufenacil activity. Applying saflufenacil in a pH 5 spray solution resulted in greater activity than pH 7 or pH 9. Although effects from saflufenacil applied under different temperatures were evident in early timings, there were no lasting effects on the efficacy of saflufenacil.;Saflufenacil had significant activity on both glyphosate-susceptible and --resistant horseweed. Under certain conditions when complete control of horseweed is not achieved, such as low application rates, large target weeds, and varying environmental conditions, application variables including glyphosate tank-mixtures, crop oil concentrate, low spray solution pH, and low light level may increase the level of horseweed control from saflufenacil.
机译：在2007年和2008年进行了田间和温室研究，以评估氟苯嘧啶对马草（Conyza canadensis（L.）Cronq。）的叶面功效。在田间，与所有其他包括除草胺的除草剂处理相比，仅以最低用量（25 g / ha）单独施用除草胺的效果下降。将草甘膦添加到25 g / ha的氟苯乙草胺中可以提高对单独施用的两种除草剂的控制水平。但是，将草甘膦添加到50 g / ha或更多的氟苯乙草胺中是无益的，因为单独使用氟苯乙草酯可提供至少95％的控制。总体而言，除草剂施用时的马草高度对单独或与草甘膦联用的氟苯乙草胺的功效几乎没有影响。；施用变量可增强苯氟乙草胺的叶面活性。在温室中，在对草甘膦易感和抗性的马草种群上，与草甘膦联合使用时，与草甘膦联合使用对草甘膦敏感。不管马草种群或草甘膦是什么，当使用农作物油浓缩物而不是非离子表面活性剂作为佐剂时，氟苯嘧啶具有更高的活性。在施用除草剂的24小时内降低光照水平会导致更大的苯丁草胺活性。在pH 5喷雾溶液中施用沙氟芬尼比pH 7或pH 9产生更大的活性。尽管早期在不同温度下施用沙氟芬尼的作用很明显，但对沙氟芬那的功效没有持久的影响。草甘膦易感和抗性马草。在某些情况下，如无法实现对马草的完全控制，例如低施用率，大目标杂草以及变化的环境条件，则包括草甘膦桶混物，农作物油浓缩物，低喷雾溶液pH值和低光照水平的施用变量可能会增加氟苯嘧啶对马草的控制水平。

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  • 作者

    Mellendorf, Tracy G.;

  • 作者单位

    Southern Illinois University at Carbondale.;

  • 授予单位 Southern Illinois University at Carbondale.;
  • 学科 Agriculture Agronomy.
  • 学位 M.S.
  • 年度 2009
  • 页码 83 p.
  • 总页数 83
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 农学（农艺学）;
  • 关键词

  • 入库时间 2022-08-17 11:37:37

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