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百草枯和敌草快属于联吡啶类除草剂,自1978年开始在黑龙江省农场局垦区农场使用,有较大批量进口。近年各地在茶园、果园、蔗田、橡胶园等经济作物上试用,也都取得很好的效果。这类除草剂具有与常用除草剂不同的除草作用特点。特别是对绿色植物没有选择性,使用不当或药雾漂移造成对农作物严重药害。为避免这类事故的继续发生,为此特对此类除草剂作概括介绍。 有两个吡啶相联结的化合物名为联吡啶化合物。吡啶环上相联的位置决定了这类化合物有无杀草活性。到目前为止,联吡啶类化合物中,只有在吡啶环2, 2’-位置相联的敌草快和在吡啶环4,4’-位置相联的百草枯在农、林、牧业上被广泛用于除草。这两种
Paraquat and Diquat belonged to the dipyridyl herbicide, which has been used in farms in the Reclamation Area of Heilongjiang Farm Bureau since 1978 and has been imported in large quantities. In recent years, various tea plants, orchards, sugar cane fields and rubber plantations have been used for trial. All these have also achieved good results. Herbicides of this type have a different herbicidal effect than the usual herbicides. In particular, there is no selectivity of green plants, improper use or pesticide drift caused serious crop injury. In order to avoid such accidents continue to occur, this herbicide for this general introduction. Compounds with two pyridine linkages are termed bipyridine compounds. The position of the pyridine ring associated with it determines the presence or absence of herbicidal activity of such compounds. So far, among the bipyridyl compounds, only paraquat linked at the 2, 2’-position of the pyridine ring and paraquat linked at the 4,4’-position of the pyridine ring have been widely used in agriculture, forestry and animal husbandry Widely used in weeding. These two