Use of strobilurin type compounds for combating phytopathogenic fungi containing an amino acid substitution f129l in the mitochondrial cytochrome b protein conferring resistance to qo inhibitors v

A compound of formula I

• wherein
• R1 is selected from O and NH;
• R2 is selected from CH and N;
• R3 is selected from hydrogen, halogen, CN, C1-C4-alkyl, C2-C4-alkenyl, C2-C4-alkynyl, C1-C4-haloalkyl, C2-C4-haloalkenyl, C2-C4-haloalkynyl, C3-C6-cycloalkyl, —O—C1-C4-alkyl, —O—C1-C4-haloalkyl, —O—C3-C6-cycloalkyl, -C1-C2-alkyl-C3-C6-cycloalkyl, phenyl, 3- to 6-membered heterocycloalkyl and 5- or 6-membered heteroaryl,
• wherein said heterocycloalkyl and heteroaryl besides carbon atoms contain 1, 2 or 3 heteroatoms selected from N, O and S provided that such heterocycle cannot contain 2 contiguous atoms selected from O and S,
• wherein said phenyl, heterocycloalkyl and heteroaryl are bound directly or via an oxygen atom or via a C1-C2-alkylene linker, and wherein said phenyl and heteroaryl are unsubstituted or substituted by 1, 2 or 3 identical or different substituents selected from halogen, CN, NH2, NO2, C1-C4-alkyl, C1-C4-haloalkyl, —O—C1-C4-alkyl and —O—C1-C4-haloalkyl;
• R4 is selected from hydrogen, C1-C6-alkyl, C2-C4-alkenyl, C2-C4-alkynyl, C1-C6-haloalkyl, C2-C4-haloalkenyl, C2-C4-haloalkynyl, -(C1-C2-alkyl)-O-(C1-C2-alkyl), -(C1-C2-alkyl)-O-(C1-C2-haloalkyl) and -C1-C4-alkyl-C3-C6-cycloalkyl;
• X, Y, independently of each other, are a direct bond or the divalent group —CL1L2—;
• L1, L2, independently of each other, are selected from hydrogen, C1-C3-alkyl, C1-C3-haloalkyl, C2-C3-haloalkenyl, C2-C3-haloalkynyl, -(C1-C2-alkyl)-O-(C1-C2-alkyl), -(C1-C2-alkyl)-O-(C1-C2-haloalkyl), cyclopropyl and -C1-C2-alkyl-cyclopropyl;
• or
• L1 and L2, together with the interjacent carbon atom, form a cyclopropyl;
• wherein the cyclic moieties of L1 and L2, independently of each other, are unsubstituted or carry 1 or 2 identical or different groups RL:
• RL is selected from halogen, CN, NO2, C1-C4-alkyl, C1-C4-haloalkyl, —O—C1-C4-alkyl, and —O—C1-C4-haloalkyl;
• Z is selected from C3-C6-cycloalkyl, phenyl, 3- to 6-membered heterocycloalkyl, 3- to 6-membered heterocycloalkenyl and 5- or 6-membered heteroaryl,
• wherein said heterocycloalkyl, heterocycloalkenyl and heteroaryl besides carbon atoms contain 1, 2 or 3 heteroatoms selected from N, O and S provided that such heterocycle cannot contain 2 contiguous atoms selected from O and S,
• and wherein Z is unsubstituted or carries 1, 2, 3 or up to the maximum number of identical or different groups Ra:
• Ra is selected from halogen, CN, NRARB, C1-C4-alkyl, C2-C4-alkenyl, C2-C4-alkynyl, —O—C1-C4-alkyl, —C(═N—O—C1-C4-alkyl)-C1-C4-alkyl, —C(═O)—C1-C4-alkyl, —C( ═O)—O—C1-C4-alkyl, —C(═O)—NH—C1-C4-alkyl, —O—CH2—C(═N—O—C1-C4-alkyl)-C1-C4-alkyl, C3-C6-cycloalkyl, C3-C6-cycloalkenyl, -C1-C2-alkyl-C3-C6-cycloalkyl, —O—C3-C6-cycloalkyl, phenyl, 3- to 6-membered heterocycloalkyl, 3- to 6-membered heterocycloalkenyl and 5- or 6-membered heteroaryl,
• wherein said heterocycloalkyl, heterocycloalkenyl and heteroaryl besides carbon atoms contain 1, 2 or 3 heteroatoms selected from N, O and S provided that such heterocycle cannot contain 2 contiguous atoms selected from O and S,
• wherein said phenyl, heterocycloalkyl, heterocycloalkenyl and heteroaryl are bound directly or via an oxygen atom or via a C1-C2-alkylene linker, and/or
• 2 Ra substituents bound to neighboring carbon ring atoms, together with the two interjacent carbon ring atoms, form a partially unsaturated or aromatic 5- to 6-membered fused carbo- or heterocycle,
• wherein the heterocycle includes beside carbon atoms 1 or 2 heteroatoms independently selected from N, O and S as ring member atoms, provided that such heterocycle cannot contain 2 contiguous atoms selected from O and S;
• and wherein the aliphatic and cyclic moieties of Ra are unsubstituted or carry 1, 2, 3, 4 or up to the maximum number of identical or different groups Rb—
• Rb is selected from halogen, CN, NO2, C1-C4-alkyl, C1-C4-haloalkyl, —O—C1-C4-alkyl, and —O—C1-C4-haloalkyl;
• RA, RB independently of each other, are selected from hydrogen, C1-C4-alkyl and C1-C4-haloalkyl;
• and in form or stereoisomers and tautomers thereof, and the N-oxides and the agriculturally acceptable salts thereof.