Novel microbiocides

A method for controlling or preventing for infestation of plants or plant propagation material and/or harvested food crops susceptible to microbial attack by treating plants or plant propagation material and/or harvested food crops with an effective amount of a benzoxaborole derivative according to formula (I)

• wherein
• R1 is selected from H, fluorine, chlorine, bromine, cyano, nitro, C1-C4alkyl which can be substituted by one to five R9, C1-C4alkoxy which can be substituted by one to five R9, and C1-C4haloalkyl which can be substituted by one to five R9a;
• R2, R3, R4, R5 and R6 are independently selected from H, fluorine, chlorine, bromine, cyano, nitro, amino, hydroxyl, C1-C6alkyl which can be substituted by one to five R9, C1-C6haloalkyl which can be substituted by one to five R9a, C3-C5cycloalky which can be substituted by one to five R9, C2-C6alkenyl which can be substituted by one to five R9, C2-C6alkynyl which can be substituted by one to five R9, C1-C6alkoxy which can be substituted by one to five R9, and C1-C6haloalkoxy which can be substituted by one to five R9a;
• or R2, R3, R4, R5 and R6 are independently selected from —NR7R8, C3-C6cycloalkyl, —C(O)(OH), —C(O)(C1-4 alkoxy), —C(O)(C1-4 alkyl), —C(O)—NH—(C1-4 alkyl), —C(O)—N(C1-4 alkyl)2, C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, C1-C4alkylthio, C1-C4alkoxy-C1-C4alkyl, C1-C4haloalkoxy, C1-C4alkoximino, —C(O)NH(C1-4 alkyl), —C(O)N(C1-4 alkyl)(C1-4 alkyl), —OC(O)NH(C1-4 alkyl), —OC(O)N(C1-4 alkyl)(C1-4 alkyl), —NHC(O)(C1-4 alkyl), —NHC(O)(C1-4 alkoxy), —N(C1-4 alkyl)C(O)(C1-4 alkyl), —N(C1-4 alkyl)C(O)(C1-4 alkoxy), —OC(O)(C1-4 alkyl), —C(═N—O—(C1-4 alkyl)-H, and —C(═N—O—(C1-4 alkyl)-C1-C4alkyl;
• or R2, R3, R4, R5 and R6 are independently selected from a -X-(6 to 10 membered-aryl) group which can be substituted by one to five substituents selected halogen, C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, —CN, —NO2, —NR6R7, C3-C6cycloalkyl;
• or R2, R3, R4, R5 and R6 are independently selected from a -X-linked-5- or 6-membered heteroaryl group which comprises one or two or three heteroatoms selected from or two N, O and S which can be substituted by one to five substituents selected from halogen, C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, —CN, —NO2, —NR6R7, C3-C6cycloalkyl;
• or R2 and R3, R3 and R4, R4 and R5, R5 and R6 can form a five- or six-membered annellated ring which comprises one or two or three heteroatoms selected from N, O and S and this heterocyclic ring can be substituted by one to five substituents selected from halogen, C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, —CN, —NO2, —NR6R7, C3-C6cycloalkyl;
• R7 and R8 are independently selected from H, —C1-4alkyl —C2-4alkenyl, —C2-4alkynyl or combine with the interjacent nitrogen to form a five- or six-membered ring which may comprise one or two or three heteroatoms selected from N, O or S atoms in addition to the interjacent nitrogen atom this heterocyclic ring can be substituted by one to five substituents selected from halogen, C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, —CN, —NO2, —NR6R7, C3-C6cycloalkyl;
• R9 is independently selected from halogen, C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, C1-C4haloalkoxy, —OH, —CN, —NO2;
• R9a is independently selected from C1-C4alkyl, C1-C4haloalkyl, C1-C4alkoxy, C1-C4haloalkoxy, —OH, —CN, —NO2;
• X is a direct bond or a bridge selected from —O—, —S(O)m— or —NH—;
• m is 0, 1 or 2;
• or an agronomically acceptable salt or N-oxide thereof.