Microbiocidal picolinamide derivatives

A compound of formula (I):

• wherein,
• R1 is hydrogen, formyl, C1-C12alkylcarbonyl, C1-C6alkoxycarbonyl, C1-C6haloalkylcarbonyl, C1-C6alkoxyC1-C6alkylcarbonyl, or C1-C6haloalkoxycarbonyl;
• R2 is hydroxyl, 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, C1-C6alkoxyC1-C6alkyl, wherein each C3-C8cycloalkyl moiety is optionally substituted with 1, 2 or 3 halogen atoms which may be the same or different;
• R6 is C1-C12alkyl, C3-C8cycloalkyl, phenyl 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 phenyl and heteroaryl moieties are optionally substituted by 1, 2, 3 or 4 substituents, which may be the same or different, selected from R8;
• or
• R5 and R6 together with the carbon atoms to which they are attached may form a 3-, 4-, 5- or 6-membered cycloalkyl or heterocycloalkyl ring, wherein the heterocyclic moiety is a stable 3-, 4-, 5- or 6-membered non-aromatic monocyclic ring which comprises 1, 2 or 3 heteroatoms, wherein the heteroatoms are individually selected from N, O and S;
• R7 is phenyl, phenoxy, 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 phenyl and heteroaryl moieties are optionally substituted by 1, 2, 3 or 4 substituents, which may be the same or different, selected from R8;
• R8 is hydroxyl, halogen, cyano, C1-C6alkyl, C2-C6alkenyl, C2-C6alkynyl, C1-C4haloalkyl, cyanoC1-C6alkyl, hydroxyC1-C6alkyl, or C1-C4alkoxyC1-C6alkyl;
• or a salt or an N-oxide thereof.