Compound of general formula (I) in which p is an integer equal to 1, 2, 3 or 4; q is an integer equal to 1, 2, 3, 4 or 5; each substituent X is chosen, independently of the others, as being halogen, alkyl or haloalkyl, at least one of the substituents being a haloalkyl; each substituent Y is chosen, independently of the others, as being halogen, alkyl, alkenyl, alkynyl, haloalkyl, alkoxy, amino, phenoxy, alkylthio, dialkylamino, acyl, cyano, ester, hydroxy, aminoalkyl, benzyl, haloalkoxy, halosulphonyl, halothioalkyl, alkoxyalkenyl, alkylsulphonamide, nitro, alkylsulphonyl, phenylsulphonyl or benzylsulphonyl; as to the N-oxides of 2-pyridine thereof; with the exception of N-{2-[3-chloro-5-(trifluoromethyl)-2-pyridinyl]-ethyl}-2,6-dichlorobenzamide. Method for preparing the compound of general formula (I). Fungicidal composition comprising the compound of general formula (I). Method for treating phytopathogenic diseases.