5-Dichloracetamido-4-nitro-1-aryl-pyrazoles of the formula ##STR1## in which R.sup.1 represents hydrogen, fluorine, chlorine or bromine, R.sup.2 represents hydrogen, fluorine or chlorine, R.sup.3 represents halogen, halogenoalkyl, halogenoalkoxy, halogenoalkythio or halogenoalkylsulphonyl, R.sup.4 represents hydrogen, fluorine, or chlorine, and R.sup.5 represents fluorine, chlorine or bromine, but in the case in which R.sup.1 and R.sup.5 simultaneously represent chlorine and in addition R.sup.2 and R.sup.4 simultaneously represent hydrogen, R.sup.3 does not represent chlorine or trifluoromethyl, exhibit herbicidal and plant growth-regulating properties. Novel intermediates therefor are also shown.
化学式为##STR1##的5-二
氯乙酰胺基-4-硝基-1-芳基
吡唑,其中R.sup.1代表氢、
氟、
氯或
溴,R.sup.2代表氢、
氟或
氯,R.sup.3代表卤素、卤代烷基、卤代烷氧基、卤代烷
硫基或卤代烷基磺酰基,R.sup.4代表氢、
氟或
氯,R.sup.5代表
氟、
氯或
溴,但在R.sup.1和R.sup.5同时表示
氯的情况下,另外R.sup.2和R.sup.4同时表示氢,R.sup.3不表示
氯或三
氟甲基,表现出除草和植物生长调节性质。同时还显示了新的中间体。