Compounds of the formula (I) wherein X and Y are independently O, S or NR5, R1, R2 and R4 are independently hydrogen, halogen, C1-C6alkyl, C1-C6haloalkyl, C1-C6alkoxy or C1-C6haloalkoxy and R3 is an aromatic five-membered heterocycle, which can be substituted are useful as a pesticides especially fungicide.