Substituted 5-alkoxy-1,2,4-triazol-3-(THI) ones

A 5-alkoxy-1,2,4-triazol-3-(thi)one derivative of the formula ##STR677## in which R.sup.2 represents in each case straight-chain or branched alkyl having 1 to 8 carbon atoms, alkenyl having 2 to 8 carbon atoms, alkinyl having 2 to 8 carbon atoms, halogenoalkyl having 1 to 8 carbon atoms and 1 to 17 identical or different halogen atoms, halogenoalkenyl having 2 to 8 carbon atoms and 1 to 15 identical or different halogen atoms, halogenoalkinyl having 2 to 8 carbon atoms and 1 to 13 identical or different halogen atoms, alkoxyalkyl or alkoxy, each of which has 1 to 6 carbon atoms in the individual alkyl moieties, cyanoalkyl having 1 to 8 carbon atoms, or represents cycloalkylalkyl or cycloalkyl, each of which has 3 to 7 carbon atoms in the cycloalkyl moiety and if appropriate 1 to 6 carbon atoms in the straight-chain or branched alkyl moiety,

• R.sup.3 represents in each case straight-chain or branched alkyl having 1 to 8 carbon atoms, alkenyl having 2 to 8 carbon atoms, alkinyl having 2 to 8 carbon atoms, halogenoalkyl having 1 to 8 carbon atoms and 1 to 17 identical or different halogen atoms, halogenoalkenyl having 2 to 8 carbon atoms and 1 to 13 identical or different halogen atoms, halogenoalkinyl having 2 to 8 carbon atoms, and 1 to 13 identical or different halogen atoms, alkoxyalkyl having 1 to 6 carbon atoms in each of the individual alkyl moieties, or represents cyanoalkyl having 1 to 8 carbon atoms, and
• R.sup.4 is methyl, ethyl, phenyl or benzyl.