A composition comprising a compound of formula I CH3CH (OH) C (>； = O) NR1R2 (I) wherein R1 and R2 are each independently hydrogen； or C1-6 alkyl, C2-6 alkenyl, or C3-6 cycloalkyl, each of which is optionally substituted with up to three independently selected substituents of phenyl, hydroxy, C1-5 alkoxy, morpholinyl, and NR3R4, where R3 and R4 are each independently C1-3 alkyl； or phenyl optionally substituted with up to three substituents independently selected from C1-3alkyl； or R1 and R2, together with the nitrogen atom to which they are attached, form a morpholinyl, pyrrolidinyl, piperidinyl or azepanyl ring, each of which is optionally substituted with up to three independently selected substituents of C1-3alkyl； and at least one biologically active compound comprising at least one five and / or six-membered aromatic ring wherein the ring contains at least one nitrogen as the ring member, with the conditions (i) that the composition does not contain cyproconazole when the compound of formula 1 is selected from the group consisting of N-butoxypropyl lactamide； 1- (hydroxyethyl) piperidinyl-lactamide； N-methyl-N-propyl-lactamide； N- (1- ethylpropyl) -lactamide； N, N-dimethyl-lactamide； N-1,4-dimethylpentyl lactamide； N- (2-hydroxyethyl) -N-benzyl-lactamide； Nmorpholinyl lactamide； N-methyl-N-butyl-lactamide； N-isobutyl-lactamide； N-allyl-lactamide； N-ethyl-lactamide； N-ethyl-N- (2-hydroxyethyl) -lactamide； and N-isopropyl-lactamide； and (ii) that the biologically active compound is not nicotinic acid when the compound of formula 1 is diethyl lactamide.Una composición que comprende un compuesto de fórmula I CH3CH(OH)C(>；=O)NR1R2 (I) en que R1 y R2 son cada uno independientemente hidrógeno； o alquilo C1-6, alquenilo C2-6 o cicloalquilo C3-6, cada uno de los cuales está opcionalmente sustituido con hasta tres sustituyentes seleccionados independientemente de fenilo, hidroxi, alcoxi C1-5, morfolinilo y NR3R4, en donde R3 y R4 son cada uno independientemente alqu
