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首页> 外文学位 >Evaluation of auxinic herbicides for broadleaf weed control, tolerance of forage bermudagrass hybrids [Cynodon dactylon (L.) Pers.], and absorption and translocation in common ragweed [Ambrosia artemisiifolia L.].
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Evaluation of auxinic herbicides for broadleaf weed control, tolerance of forage bermudagrass hybrids [Cynodon dactylon (L.) Pers.], and absorption and translocation in common ragweed [Ambrosia artemisiifolia L.].

机译：评价用于阔叶杂草控制，草甘蓝杂交种[Cynodon dactylon（L.）Pers。]以及普通豚草[Ambrosia artemisiifolia L.]的吸收和易位的除草剂除草剂。

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摘要

These studies were conducted on several central Texas agricultural producers' properties, the Stiles Farm Foundation, the Texas Agricultural Experiment Station, and the Texas A&M University campus. First, an experimental herbicide from Dow AgroSciences, GF-884, was evaluated for effectiveness in controlling three annual and three perennial weed species in production pasture lands and hay meadows. Several rates of GF-884 were examined and evaluated against three registered pasture products and one non-selective herbicide. Next, GF-884 was assessed for tolerance on two common bermudagrass hybrids (Cynodon dactylon (L.) Pers.) at three progressive rates with and without adjuvant. Finally, the herbicides, picloram and fluroxypyr, were applied to common ragweed (Ambrosia artemisiifolia L.) to characterize their individual absorption and translocation and assess any influence one might have on the other.; GF-884 applied at rates of 0.91 and 1.14 kg a.e./ha provided >85% and >75% control of the annual and perennial weed species evaluated, respectively. These same rates of GF-884 consistently provided control that was equivalent or better than that achieved with the registered products. No differences were observed among treatments when shoots from the perennial species were evaluated 12 months following treatment application. The tolerance experiments utilized GF-884 at rates twice that used to evaluate weed control efficacy. These elevated rates did not result in discernible influences on yield or forage quality for either hybrid forage grass when compared to untreated areas. The efficacy and tolerance observations suggest that GF-884 applied at the highest recommended weed control rate can effectively control several annual and perennial weed species without imparting detrimental effects to the hybrid bermudagrass being produced.; Finally, in the presence of fluroxypyr, 14C picloram absorption was maintained throughout all sampling intervals. Picloram applied alone, maximized 14C absorption at 6 HAT then declined significantly. At the final sampling, 14C from picloram applied alone was in greater concentration in the treated leaf and the root.; Picloram significantly decreased absorption of 14C fluroxypyr. Fluroxypyr alone maintained 14C absorption throughout all samplings, whereas the combination maximized at 12 HAT. Initially, picloram limited 14C translocation, however at 6, 12, and 24 HAT this was not evident.
机译：这些研究是在德克萨斯州中部几个农业生产者的财产，Stiles农场基金会，德克萨斯州农业实验站和德克萨斯州A＆M大学校园内进行的。首先，对来自陶氏益农的实验性除草剂GF-884进行了评估，以控制其在牧场，草地上的三种一年生和三个多年生杂草种类的有效性。针对三种注册的牧草产品和一种非选择性除草剂，检查和评估了GF-884的几种比率。接下来，在有和没有佐剂的情况下，以三个渐进速率评估了GF-884对两种常见的百慕大草杂种（犬齿鳄（Cynodon dactylon（L.）Pers。）的耐受性。最后，将除草剂吡咯兰和氟草烟施用于普通豚草（Ambrosia artemisiifolia L.），以表征它们的个体吸收和转运，并评估一种对另一种的影响。 GF-884以0.91和1.14 kg a.e./ha的施用量分别控制了所评估的一年生和多年生杂草种类的> 85％和> 75％。这些相同比率的GF-884始终提供与注册产品相同或更好的控制。在处理后12个月对多年生植物的芽进行评估时，在处理之间未观察到差异。耐受性实验使用GF-884的速度是评估杂草控制功效的两倍。与未处理的地区相比，这些提高的比率均未对两种杂草料草对产量或草料质量产生明显影响。功效和耐受性观察表明，以推荐的最高杂草控制率施用的GF-884可以有效控制数种一年生和多年生杂草，而不会对所产杂种百慕大草产生不利影响。最后，在氟草烟的存在下，在所有采样间隔内维持14 C吡咯烷吸收。吡氯仑单独使用时，在6 HAT下最大吸收14 C，然后显着下降。在最终取样中，单独施用的吡咯烷的14 C在处理过的叶和根中的浓度更高。 Picloram显着降低了14C氟草烟的吸收。在所有采样中，单独使用氟草烟保持14 C吸收，而组合在12 HAT时最大。最初，吡咯烷酮限制了14C易位，但是在HAT的6、12和24处这一点并不明显。

著录项

  • 作者

    Moore, Frederick Thomas.;

  • 作者单位

    Texas A&M University.;

  • 授予单位 Texas A&M University.;
  • 学科 Agriculture Agronomy.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 96 p.
  • 总页数 96
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 农学（农艺学）;
  • 关键词

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