The invention relates to N-arylsulfonyl-N'-pyrimidinyl ureas of the general formula ##STR1## and to the salts thereof with amines, alkali metal hydroxides or alkaline earth metal hydroxides or with quaternary ammonium bases. These compounds have good pre- and postemergence selective herbicidal and growth regulating properties. In the formula, R.sub.18 is hydrogen, alkyl or alkoxy, X is an unsubstituted or substituted phenyl radical or an unsubstituted or substituted naphthyl radical, Y is C.sub.1 -C.sub.3 alkyl, C.sub.1 -C.sub.3 haloalkyl, C.sub.1 -C.sub.3 alkoxy, C.sub.1 -C.sub.3 haloalkoxy, C.sub.1 -C.sub.3 alkylthio, C.sub.2 -C.sub.3 alkoxyalkyl, halogen or an unsubstituted amino group and Z is oxygen or sulfur.
                            本发明涉及一般式为##STR1##的N-芳基磺酰-N'-
嘧啶脲及其与胺、碱
金属氢氧化物或碱土
金属氢氧化物或季
铵碱基的盐。这些化合物具有良好的前后除草和生长调节性能。在该式中,R.sub.18是氢、烷基或烷氧基,X是未取代或取代的苯基基团或未取代或取代的
萘基基团,Y是C.sub.1-C.sub.3烷基、C.sub.1-C.sub.3卤代烷基、C.sub.1-C.sub.3烷氧基、C.sub.1-C.sub.3卤代烷氧基、C.sub.1-C.sub.3烷
硫基、C.sub.2-C.sub.3烷氧基烷基、卤素或未取代的
氨基团,Z是氧或
硫。