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首页> 外文学位 >TOXICITY, ABSORPTION, AND TRANSLOCATION OF SOIL AND FOLIAR APPLIED IMAZAQUIN IN YELLOW (CYPERUS ESCULENTUS) AND PURPLE (C. ROTUNDUS) NUTSEDGE.
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TOXICITY, ABSORPTION, AND TRANSLOCATION OF SOIL AND FOLIAR APPLIED IMAZAQUIN IN YELLOW (CYPERUS ESCULENTUS) AND PURPLE (C. ROTUNDUS) NUTSEDGE.

机译：在黄色（香附子）和紫色（C. Rotundus）的坚果中，土壤和叶面施用的IMAZAQUIN的毒性，吸收和转运。

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摘要

Studies were conducted to investigate the toxicity of soil and foilar applied imazaquin in yellow and purple nutsedge. Soil incorporated imazaquin rates from 0.1 to 0.5 ppmw reduced plant dry weight of yellow nutsedge by 92 to 99%, and that of purple nutsedge by 82 to 99%. Imazaquin placement above the tuber was significantly more toxic than placement either around or below the tuber. This suggests that a shallow incorporation of imazaquin at 1 to 2 inch depth should provide effective nutsedge control. Incrementing imazaquin rate significantly increased the number of sprouts when the herbicide was placed above the tuber. This apparent release of apical dominance may be a result of herbicide absorption and translocation from the sprouts to the lateral buds of the tuber at growth regulatory level or a result of the death of the current sprout at lethal concentrations. Three-day old nutsedge propagules absorbed significantly greater amounts of ('14)C-imazaquin from shoot application than from root application (nutrient solution). The emerging shoot appeared to be the major site of imazaquin uptake at early stages of nutsedge plant development.;Under field conditions, yellow nutsedge control with imazaquin was inconsistent. Soil type and weather conditions greatly influenced the performance. Nutsedge control was better in narrow rows than in wide rows. In general, pre-plant incorporated treatments gave better control than postemergence treatments.;Imazaquin activity was slow following postemergence application. Tiller development from the basal bulbs of plants treated with imazaquin indicated that kill was not complete. The rates of 0.188 kg/ha and lower caused significantly greater tillering than the higher rates. Foliar applied ('14)C-imazaquin was absorbed and translocated basipetally in both plant species. Purple nutsedge plants translocated twice the amount of absorbed ('14)C as yellow nutsedge plants at 8 days after application. The rhizomes and roots of yellow nutsedge plants had equal amounts of radioactivity, whereas the rhizomes of purple nutsedge plants accumulated significantly greater amounts than their roots. Foliar applied imazaquin showed greater toxicity on purple nutsedge than on yellow nutsedge. There was greater translocation and spray retention in purple nutsedge plants than in yellow nutsedge plants.
机译：进行了研究，以研究在黄色和紫色胡桃木中土壤和箔状施用的imazaquin的毒性。土壤中掺入的阿扎喹的比率为0.1至0.5 ppmw，黄色坚果的植物干重减少了92至99％，紫色坚果的植物干重减少了82至99％。放置在块茎上方的伊马喹喹的毒性要比放置在块茎周围或下方的毒得多。这表明在1至2英寸深度处浅掺入imazaquin应该可以提供有效的营养控制。当将除草剂置于块茎上方时，增加伊马喹喹的比率会显着增加芽的数量。顶端优势的这种明显释放可能是除草剂在生长调节水平上从芽苗到块茎侧芽的吸收和转运的结果，或者是在致死浓度下当前芽苗死亡的结果。三天大的八角形繁殖体从根部施用比从根部施用（营养液）吸收的（'14）C-咪唑喹量要大得多。新兴的芽似乎是在坚果植物发育的早期阶段吸收氮杂喹的主要部位。在田间条件下，用氮杂喹对黄色坚果的控制是不一致的。土壤类型和天气条件极大地影响了性能。在窄行比宽行更好地控制了坚果。通常，与芽后处理相比，种植前掺入处理提供了更好的控制。芽后施用后，Izazaquin的活性较慢。用咪唑喹处理过的植物的基鳞茎的分iller发育表明杀灭尚未完成。 0.188 kg /公顷及以下的比例比较高的比例明显提高了分till。在这两种植物中，叶面施用的（'14）C-咪唑喹被吸收并基序转移。施用后第8天，紫色的坚果植物转移的吸收（'14）C量是黄色的坚果植物的两倍。黄色的八角茴香植物的根茎和根具有相等的放射性，而紫色的八角茴香植物的根茎中积累的根离子量明显大于其根部。叶面施用的阿扎喹对紫色小胡瓜的毒性大于对黄色小胡瓜的毒性。紫色的北缘植物比黄色的北缘植物具有更高的易位性和喷雾保持力。

著录项

  • 作者

    NANDIHALLI, UJJANAGOUDA B.;

  • 作者单位

    The Ohio State University.;

  • 授予单位 The Ohio State University.;
  • 学科 Agronomy.
  • 学位 Ph.D.
  • 年度 1986
  • 页码 118 p.
  • 总页数 118
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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