Herbicidal and fungicidal substituted triazolinones of the formula ##STR1## in which R.sup.1 represents hydrogen, alkyl, alkenyl, alkinyl, halogenoalkyl, halogenoalkenyl, halogenoalkinyl, alkoxyalkyl, cycloalkyl or cycloalkylalkyl, or represents tetrahydrofuranyl or tetrahydrofuranylalkyl, or represents in each case optionally substituted aralkyl or aryl, R.sup.2 represents hydrogen, alkyl, alkenyl, alkinyl halogenoalkyl, halogenoalkenyl, halogenoalkinyl, cyanoalkyl, hydroxyalkyl, alkoxyalkyl, aryloxyalkyl, alkoxycarbonylalkyl, alkoxycarbonylalkenyl, alkylaminoalkyl or dialkylaminoalkyl, or represents in each case optionally substituted cycloalkyl, cycloalkylalkyl, cycloalkenyl or cycloalkenylalkyl, or represents optionally substituted heterocyclylalkyl, or represents in each case optionally substituted aralkyl, aroyl, aryl, aralkyloxy or aryloxy, or represents alkoxy, alkenyloxy of alkinyloxy, R.sup.3 represents alkyl, alkenyl, alkinyl, halogenoalkyl, halogenoalkenyl, halogenoalkinyl, cyanoalkyl, alkoxyalkyl or alkylthioalkyl, or represents in each case optionally substituted cycloalkyl, cycloalkylalkyl, aryl or aralkyl, X represents oxygen or sulphur and Y represents oxygen or sulphur, and new intermediates.