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双氟磺草胺的除草活性及对不同小麦品种的安全性评价

, PP. 357-363

Keywords: 双氟磺草胺,小麦,杀草谱,生物活性,安全性

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Abstract:

双氟磺草胺为三唑并嘧啶磺酰胺类除草剂,为了明确其在我国北方麦田的应用前景,采用室内生测法研究双氟磺草胺的杀草谱、除草活性及对不同小麦品种安全性。双氟磺草胺对麦田常见阔叶杂草活性较高,对麦田恶性杂草播娘蒿、麦瓶草、麦家公、猪殃殃和荠菜的除草活性均高于常用除草剂苯磺隆,毒力倍数分别为1.56、6.26、1.65、18.27和22.75。济南17和山优2号2种小麦对双氟磺草胺的耐药性分别为苯磺隆的2.57倍和11.66倍。双氟磺草胺在小麦与5种杂草之间的选择性指数(11.16~49.32)远优于苯磺隆。该除草剂对小麦苗期的株高及鲜重有抑制作用,且对不同小麦品种的影响差异显著,其中对临麦2号、济宁13及济南17的株高和鲜重抑制率相对较高,对潍麦8号、山农6号及泰山9818等相对较低。研究表明双氟磺草胺具有很好的应用前景。

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