Undesired vegetation, particularly noxious grasses in growing crops, are combated by pre-emergent application of selective herbicides made by reacting an organic compound having a reactive halogen substituent with a 2,3-epithiopropyl N,N-dialkylthiolcarbamate to yield a compound of the structural formula IN WHICH R and R' represent hydrocarbon substituents containing less than 10 carbon atoms, X is halogen, preferably bromine or chlorine and Y may be alkanoyl, chloroalkanoyl, bromoalkanoyl, alkoxyalkanoyl, N,N-dialkylcarbamyl, carbalkoxycarbonyl, alkoxymethyl, alkoxyethyl, chlorobenzoyl, bromobenzoyl, chlorophenoxyacetyl, bromophenoxyacetal, cyclopropylcarbonyl, cyano, methanesulfonyl, alkanoylmethyl alkylmercaptomethyl, nitrobenzoyl, chlorocarbalkoxyl, bromocarbalkoxyl, ethynylmethyl, dialkylphosphono, dialkylthiophosphono or alkylmercaptocarbonyl, said alkanoyl, alkoxy, carbalkoxy and alkyl structures containing less than 10 carbon atoms.
不受欢迎的植物,特别是在种植作物中的有害草草,通过在苗前施用选择性除草剂来进行控制,该除草剂是通过将具有反应性卤素取代基的有机化合物与2,3-环硫丙基N,N-二烷基硫代氨基甲酸酯反应而制得的,从而得到一种具有结构式的化合物,其中R和R'代表含有不超过10个碳原子的碳氢基取代基,X为卤素,优选溴或氯,Y可以是烷酰基,氯代烷酰基,溴代烷酰基,烷氧基烷酰基,N,N-二烷基氨基甲酰基,羰基氧羰基,烷氧基甲基,烷氧基乙基,氯苯甲酰基,溴苯甲酰基,氯苯氧乙酰基,溴苯氧乙酰基,环丙基羰基,氰基,甲磺酰基,烷酰基甲基烷基硫代甲基,硝基苯甲酰基,氯代羰基氧羰基,溴代羰基氧羰基,乙炔基甲基,二烷基膦酸酯,二烷基硫代膦酸酯或烷硫代羰基,所述的烷酰基,烷氧基,羰基氧羰基和烷基结构含有不超过10个碳原子。