The present invention relates to mixtures comprising as active componentsa) carbamate derivatives of the formula Iin which the substituents and the index have the following meaning:T is CH or Nn is 0, 1 or 2R is halogen, C1-C4-alkyl or C1-C4-haloalkyl, it being possible for the radicals R to be different when n is 2,andb) at least one compound of the formula II