为了探索除草剂Tiafenacil在防治农业杂草方面的应用前景,以3-氨基-4,4,4-三氟丁烯酸乙酯为原料,经6步反应制备得到Tiafenacil,其结构经 1H NMR 和 ESI-MS 确证,并对Tiafenacil 进行除草活性测定.结果表明:Tiafenacil在苗前浓度为300 g a.i.·hm-2 条件下,其对稗草、苘麻的除草活性均优于对照药剂97%莠去津原药;在苗前浓度为75 g a.i.·hm-2 条件下,其对稗草、苘麻的除草活性均优于对照药剂97%氟磺胺草醚原药.苗后浓度为37.5、75、150、300 g a.i.·hm-2 条件下,其对稗草、金色狗尾草、百日草、苘麻的除草活性均可达100%,明显优于对照药剂97%氟磺胺草醚原药和97%莠去津原药.
Abstract
In order to explore the application prospects of the herbicide Tiafenacil in the control of agricultural weeds,Tiafenacil was prepared by 6-step reaction using ethyl 3-amino-4,4,4-trifluorobutenoate as raw material,and its structure was confirmed by 1H NMR and ESI-MS.The results showed that the herbicidal activity of Tiafenacil was better than that of the control agent 97%atrazine original drug under the condition that the pre-seedling concentration was 300 g a.i.·hm-2.Under the condition that the pre-seedling concentration was 75 g a.i.·hm-2,its herbicidal activity on barnyard grass and hemp was better than that of the control agent 97%flusulfamethamine.Under the conditions of post-seedling concentration of 37.5,75,150,300 g a.i.·hm-2,its herbicidal activity against barnyard grass,golden dogtail,zinnias and hemp could reach 100%,which was significantly better than that of the control agent 97%flusulfametholin and 97%atrazine original drug.
维普
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