Picolinamide N-oxide compounds with fungicidal activity

A compound of Formula I,

• wherein:
• R1 is hydrogen or C1-C5 alkyl, each optionally substituted with 0, 1 or multiple R6;
• R2 is hydrogen, C1-C5 alkyl or cycloalkyl, each optionally substituted with 0, 1 or multiple R6;
• R3 is alkyl, cycloalkyl, aryl or heteroaryl, each optionally substituted with 0, 1 or multiple R6;
• R4 is hydrogen, halo, hydroxyl, alkyl, or alkoxy;
• R5 is alkyl, cycloalkyl, aryl, heteroaryl, alkoxy, aryloxy, heteroaryloxy, each optionally substituted with 0, 1 or multiple R6;
• R6 is hydrogen, alkyl, aryl, acyl, halo, alkoxy, or heterocyclyl, each optionally substituted with 0, 1 or multiple R7;
• R7 is hydrogen, alkyl, aryl, acyl, halo, alkoxy, or heterocyclyl;
• and
• R8 is hydrogen or C1-C5 alkyl, each optionally substituted with 0, 1 or multiple R6.