[目的]探索新型脲嘧啶类除草剂epyrifenacil在农业除草领域的应用前景.[方法]以2,3-二羟基吡啶为起始原料通过8步反应制备得到epyrifenacil,并使用1H NMR和ESI-MS对其结构进行确认.[结果]Epyrifenacil的除草效果优异,在37.5、9.38 g a.i./hm2时,对阔叶杂草百日草Zinnia elegans、苘麻Abutilon theophrasti及禾本科杂草稗草Echinochloa crusgalli、金色狗尾草Setaria glauca的除草活性均达到100％;在测试剂量为2.34 g a.i./hm2时对百日草、苘麻、稗草、金色狗尾草的除草活性分别为100％、100％、80％、70％,均远优于对照药剂氟磺胺草醚和莠去津.以上结果都表明,epyrifenacil是一种极具开发前景的新型除草剂品种.
Abstract
[Aims]This study aims to explore the application prospects of the new uracil herbicide epyrifenacil in the field of agricultural weeding.[Methods]The compound epyrifenacil was prepared using 2,3-dihydroxypyridine as the starting material through 8 steps,and its structure was confirmed by 1H NMR and ESI-MS.[Results]The herbicidal activity of epifenacil was excellent.At test concentrations of 37.5 and 9.38 g a.i./ha,its herbicidal activity against broad-leaved weeds such as Zinnia elegans and Abutilon theophrasti and grass such as Echinochloa crusgalli and Setaria glauca all reached 100％ .At test concentrations of 2.34 g a.i./ha,its herbicidal activity against Z.elegans,A.theophrasti,E.crusgalli and S.glauca was 100％ ,100％ ,80％ and 70％ ,respectively,which were far superior to the control fluazuron and atrazine.The above results indicate that epyrifenacil is a highly promising new herbicide variety.
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