Active substance combinations that have nematicidal, insecticidal, and fungicidal properties and are based on trifluorobutenyl compounds

1. A synergistic composition, characterized in that it comprises an active compound combination comprising

(a) one or more active compounds of the formula (I)

in which

X represents halogen and

n represents 0, 1 or 2,

and

(b) one or more active compounds selected from the group consisting of

carpropamid, chloraniformethan, clozylacon, cyazofamid, cyflufenamid, diclocymet, ethaboxam, fenoxanil, flumetover, furametpyr, prochloraz, quinazamid, silthiofam, triforine, benalaxyl, benalaxyl-M, furalaxyl, metalaxyl, metalaxyl-M, pefurazoate, benzohydroxamic acid, tioxymid, trichlamide, tricyclamide, zarilamid, zoxamide, cyclafuramid, furmecyclox, dichlofluanid, benthiavalicarb, iprovalicarb, benalaxyl, benalaxyl-M, boscalid, carboxin, fenhexamid, metalaxyl, metalaxyl-M, metsulfovax, ofurace, oxadixyl, oxycarboxin, pyracarbolid, thifluzamide, tiadinil, benzanilides, furanilides, and flusulfamide.

2. The synergistic composition of claim 1 , characterized in that it comprises one or more compounds of formula (I) in which

X represents fluorine, chlorine or bromine and

n represents 0 or 2.

3. The synergistic composition of claim 1 , characterized in that it comprises one or more compounds of the formula (I) in which

X represents fluorine or chlorine and

n represents 2.

4. The synergistic composition of claim 1 , characterized in that it comprises, as active compounds of the formula (I), one of the following compounds of formulae (IA), (IB) and (IC)

5. The synergistic composition of claim 4 , wherein said active compound of formula (I) is the compound of formula (IC).

6. A method for controlling fungi, nematodes, insects or acarids, characterized in that mixtures as claimed in claim 1 are allowed to act on nematodes and/or insects and/or fungi and/or their habitats.

7. A process for preparing fungicidal, nematicidal, insecticidal and/or fungicidal compositions, characterized in that compositions as claimed in claim 1 are mixed with extenders and/or surfactants.

8. The synergistic composition of claim 1 , wherein the one or more active compounds of (b) are selected from the group consisting of cyazofamid, metalaxyl, metalaxyl-M, boscalid, carboxin and fenhexamid.

9. The synergistic composition of claim 1 , wherein the one or more active compounds of (b) are selected from the group consisting of zoxamide, benthiavalicarb, iprovalicarb, benalaxyl, thifulzamide and flusulfamide.

10. The synergistic composition of claim 1 , wherein benzanilides are selected from the group consisting of benodanil, flutolanil, mebenil, mepronil, salicylanilide, and tecloftalam.

11. The synergistic composition of claim 1 , wherein furanilides are selected from the group consisting of fenfuram, furalaxyl, furcarbanil, and methfuroxam.