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, C1-C6alkoxyC1-C6alkyl, or C3-C8halocycloalkyl;
• R6 is methyl;
• R7 is 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 heteroaryl moiety is optionally substituted by 1, 2 or 3 substituents, which may be the same or different, selected from R8, or is optionally substituted by a single substituent which is R9, or is optionally substituted by a single substituent which is R8 and a single substituent which is R9;
• R8 is hydroxy, halogen, cyano, C1-C6alkyl, C2-C6alkenyl, C2-C6alkynyl, C1-C4haloalkyl, cyanoC1-C6alkyl, hydroxyC1-C6alkyl, or C1-C4alkoxyC1-C6alkyl;
• R9 is phenyl optionally substituted by 1 or 2 substituents, which may be the same or different, selected from R10, or R9 is a 1,2-phenylene attached to the heteroaryl moiety to form a 9- or 10-membered heterobiaryl, wherein the phenylene ring is optionally substituted by 1 or 2 substituents, which may be the same or different, selected from R10;
• and
• R10 is halogen;
• or a salt or an N-oxide thereof.