Microbiocidal oxadiazole derivatives

A compound of formula (I):

• wherein
• n is 0, 1 or 2;
• A1 represents N or CR1, wherein R1 is hydrogen, halogen, methyl, ethyl, difluoromethyl, trifluoromethyl, methoxy, ethoxy, or difluoromethoxy;
• A2 represents N or CR2, wherein R2 is hydrogen, halogen, methyl, ethyl, difluoromethyl, trifluoromethyl, methoxy, ethoxy, or difluoromethoxy;
• A3 represents N or CR3, wherein R3 is hydrogen or halogen;
• and
• A4 represents N or CR4, wherein R4 is hydrogen or halogen;
• wherein no more than two of A1 to A4 are N;
• R5 is hydrogen, C1-4alkyl, C3-6cycloalkyl or C1-4alkoxy;
• R6 and R7 are independently selected from hydrogen, cyano, C1-4alkyl, C1-4haloalkyl, C3-6cycloalkyl and C1-4alkoxy;
• R8 represents hydrogen, C1-6alkyl, C2-6alkenyl, C2-6alkynyl, C1-6haloalkyl, C3-8cycloalkyl or phenyl;
• R9 represents hydrogen, C1-12alkyl, C2-6alkenyl, C2-6alkynyl, C1-4haloalkyl, C2-4haloalkenyl, hydroxyC1-4alkyl, cyanoC1-4alkyl, C1-4alkoxyC1-4alkyl, hydroxycarbonylC1-4alkyl, C1-4alkoxycarbonylC1-4alkyl, aminoC1-4alkyl, C3-8cycloalkyl, C3-8cycloalkylC1-3alkyl, phenyl, phenylC1-4alkyl, heterocyclyl or heterocyclylC1-4alkyl wherein the heterocyclyl moiety is a 4- to 6-membered non-aromatic ring which comprises 1, 2 or 3 heteroatoms individually selected from N, O and S, and wherein C3-8cycloalkyl, phenyl and heterocyclyl moieties are optionally substituted by 1, 2, or 3 substituents, which may be the same or different, selected from R10, or 1, 2, 3, 4 or 5 substituents, which may be the same or different, selected from R11;
• R10 represents cyano, nitro, C1-6alkyl, C2-6alkenyl, C2-6alkynyl, C1-6haloalkyl, C1-6alkoxy, C1-6haloalkoxy, C1-6alkylthio, C1-4alkoxycarbonylC1-4alkyl, hydroxycarbonylC1-4alkyl, or C3-8cycloalkyl;
• and
• R11 represents halogen;
• or
• a salt or an N-oxide thereof.