Microbiocidal picolinamide derivatives

A compound of formula (I):

• wherein,
• R1 is C1-C12alkyl or C1-C6haloalkyl;
• R2 is hydroxy, C2-C6acyloxy, C2-C6haloacyloxy, C1-C6alkoxyC1-C6alkoxy, C1-C6haloalkoxyC1-C6alkoxy, C1-C6alkoxyC1-C6haloalkoxy, C2-C6acyloxyC1-C6alkoxy, C2-C6haloacyloxyC1-C6alkoxy, or C2-C6acyloxyC1-C6haloalkoxy;
• R3 is hydrogen, C1-C6alkyl, C1-C6alkoxy or C3-C8cycloalkyl;
• R4 and R5 are each independently C1-C12alkyl, C3-C8cycloalkyl, C1-C6haloalkyl or C1-C6alkoxyC1-C6alkyl;
• R6 is hydrogen, C1-C12alkyl, C3-C8cycloalkyl, aryl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring which comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, and wherein the aryl and heteroaryl moieties are each optionally substituted by 1, 2 or 3 substituents, which may be the same or different, selected from R9;
• R7 is hydrogen, C1-C12alkyl, C3-C8cycloalkyl, aryl or heteroaryl, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring which comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, and wherein the aryl and heteroaryl moieties are each optionally substituted by 1, 2 or 3 substituents, which may be the same or different, selected from R9;
• or
• R6 and R7 together with the carbon atom to which they are attached form a C3-C8cycloalkyl ring which is optionally substituted by 1, 2 or 3 substituents, which may be the same or different, selected from R9;
• R8 is C1-C12alkyl, C3-C8cycloalkyl, aryl, aryloxy, heteroaryl, or heteroaryloxy, wherein the heteroaryl moiety is a 5- or 6-membered aromatic ring which comprises 1, 2, 3 or 4 heteroatoms individually selected from N, O and S, and wherein the aryl and heteroaryl moieties are each optionally substituted by 1, 2 or 3 substituents, which may be the same or different, selected from R9;
• R9 is halogen, cyano, C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, or C1-C4haloalkoxy;
• or a salt or an N-oxide thereof.