A substituted acetylene-ketone of the formula
- R.sup.2 --C.tbd.C--CO--R.sup.1
- in which
- R.sup.1 is ##STR36## R.sup.2 is straight chain or branched alkyl with 1 to 12 carbon atoms, cycloalkenyl with 5 to 7 carbon atoms the cycloalkenyl ring being mono-, di- or tri-substituted by identical or different alkyl radicals with 1 to 4 carbon atoms, or
- R.sup.2 is cycloalkylalkyl with 3 to 7 carbon atoms in the cycloalkyl part and 1 to 4 carbon atoms in the alkyl part, or is cycloalkylalkyl with 3 to 7 carbon atoms in the cycloalkyl part and 1 to 4 carbon atoms in the alkyl part, the cycloalkyl part being mono-, di- or tri-substituted by identical or different alkyl radicals with 1 to 4 carbon atoms, or
- R.sup.2 is phenyl or phenylalkyl with 1 to 4 carbon atoms in the alkyl part, or is phenyl which is mono-, di- or tri-substituted by identical or different substituents selected from halogen, alkyl with 1 to 4 carbon atoms, alkoxy with 1 to 4 carbon atoms, alkylthio with 1 to 4 carbon atoms, halogenoalkyl with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, halogenoalkoxy with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, halogenoalkylthio with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, nitro, cyano, alkoxycarbonyl with 1 to 4 carbon atoms in the alkoxy part, phenyl, halo-substituted phenyl, phenoxy and halo-substituted phenoxy, or is phenylalkyl with 1 to 4 carbon atoms in the alkyl part, which phenyl moiety is mono-, di- or tri-substituted by identical or different substituents selected from halogen, alkyl with 1 to 4 carbon atoms, alkoxy with 1 to 4 carbon atoms, alkylthio with 1 to 4 carbon atoms, halogenoalkyl with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, halogenoalkoxy with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, halogenoalkylthio with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, nitro, cyano, alkoxycarbonyl with 1 to 4 carbon atoms in the alkoxy part, phenyl, halo-substituted phenyl, phenoxy and halo-substituted phenoxy,
- R.sup.3 is fluorine, chlorine or bromine,
- R.sup.4 is hydrogen, fluorine, chlorine or bromine,
- R.sup.5 is straight-chain or branched alkyl with 2 to 6 carbon atoms, straight-chain or branched alkenyl with 2 to 4 carbon atoms, straight-chain or branched alkinyl with 3 to 5 carbon atoms or a group selected from formyl, oxime, oxime ether, acetal, dioxolane, substituted dioxolane, dioxane and substituted dioxane, or
- R.sup.5 is methyl, if R.sup.2 is optionally substituted cycloalkenyl or optionally substituted cycloalkylalkyl,
- R.sup.6 is cyano, phenyl, or phenyl which is mono-, di- or tri-substituted by identical or different substituents selected from halogen, alkyl with 1 to 4 carbon atoms, alkoxy with 1 to 4 carbon atoms, alkylthio with 1 to 4 carbon atoms, halogenoalkyl with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, halogenoalkoxy with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, halogenoalkylthio with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, nitro, cyano, alkoxycarbonyl with 1 to 4 carbon atoms in the alkoxy part, phenyl, halo-substituted phenyl, phenoxy and halo-substituted phenoxy, or
- R.sup.6 is the grouping --XR.sup.7, wherein
- R.sup.7 is straight-chain or branched alkyl with 1 to 6 carbon atoms, halogenoalkyl with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, phenyl, phenylalkyl with 1 or 2 carbon atoms in the alkyl part, or phenyl which is mono-, di- or tri-substituted by identical or different substituents selected from halogen, alkyl with 1 to 4 carbon atoms, alkoxy with 1 to 4 carbon atoms, alkylthio with 1 to 4 carbon atoms, halogenoalkyl with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, halogenoalkoxy with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, halogenoalkylthio with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, nitro, cyano, alkoxycarbonyl with 1 to 4 carbon atoms in the alkoxy part, phenyl, halo-substituted phenyl, phenoxy and halo-substituted phenoxy, or
- R.sup.7 is phenylalkyl with 1 or 2 carbon atoms in the alkyl part, the phenyl part being mono-, di- or tri-substituted by identical or different substituents selected from halogen, alkyl with 1 to 4 carbon atoms, alkoxy with 1 to 4 carbon atoms, alkylthio with 1 to 4 carbon atoms, halogenoalkyl with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, halogenoalkoxy with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, halogenoalkylthio with 1 to 4 carbon atoms and 1 to 5 identical or different halogen atoms, nitro, cyano, alkoxycarbonyl with 1 to 4 carbon atoms in the alkoxy part, phenyl, halo-substituted phenyl, phenoxy and halo-substituted phenoxy,
- X is O, S, SO or SO.sub.2 and the index
- n is 0 or 1.