Pesticidally active pyridazinone compounds

A compound of the formula (I)

• wherein:
• Q is
• where the staggered line represents the connection of Q to the rest of compound of the formula (I);
• A is N or CRY;
• R1 is hydrogen, C1-C6alkyl, C1-C6cyanoalkyl, aminocarbonylC1-C6alkyl, hydroxycarbonylC1-C6alkyl, C1-C6nitroalkyl, trimethylsilaneC1-C6alkyl, C1-C3alkoxy-C1-C6alkyl, C1-C6haloalkyl, C2-C6alkenyl, C2-C6haloalkenyl, C2-C6alkynyl, C2-C6haloalkynyl, C3-C4cycloalkyl-C1-C2alkyl, C3-C4cycloalkyl-C1-C2alkyl wherein the C3-C4cycloalkyl group is substituted with 1 or 2 halogen atoms, oxetan-3-yl-CH2—, C1-C6alkylcarbonyl, C1-C6alkoxycarbonyl, phenyloxycarbonyl, benzyloxycarbonyl, benzyl, or benzyl substituted with 1 to 3 substituents independently selected from halogen, C1-C6alkoxy and C1-C6haloalkyl;
• R2a and R2b are independently selected from hydrogen, C1-C3alkyl, C1-C3haloalkyl, C1C3haloalkylsuflanyl, C1-C3alkoxy, C1-C3haloalkoxy, halogen, NO2, SF5, CN, C(O)NH2, C(O)OH, C(S)NH2, C3-C6cycloalkyl, C3-C6cycloalkyl substituted with one to three substituents independently selected from RX;
• C1-C6cycloalkylcarbonyl, phenyl, phenyl substituted with one to three substituents independently selected from RX;
• heteroaryl, heteroaryl substituted with one to three substituents independently selected from RX;
• OR6, piperidin-2-one-1-yl, piperidin-2-one-1-yl substituted with one to two substituents independently selected from RX;
• pyridin-2-one-1-yl, pyridin-2-one-1-yl substituted with one to two substituents independently selected from RX;
• azetidin-1-yl, azetidin-1-yl substituted with one to two substituents independently selected from RX;
• pyrrolidin-1-yl, pyrrolidin-1-yl substituted with one to two substituents independently selected from RX;
• C3-C6cycloalkyl-C1C4alkyl, C3-C6cycloalkyl-C1-C4alkyl substituted with one to two substituents independently selected from RZ;
• C3-C6cycloalkyl-C1-C3alkoxy, C3-C6cycloalkyl-C1-C3alkoxy substituted with one to two substituents independently selected from RX;
• C1-C5cyanoalkyl, C1-C5cyanoalkoxy, C1-C4alkylsulfanyl, C1-C4alkylsulfanyl substituted with one to three substituents independently selected from RX;
• C1C4alkylsulfonyl, C1-C4alkylsulfonyl substituted with one to three substituents independently selected from RX;
• C1-C4alkylsulfinyl, and C1-C4alkylsulfinyl substituted with one to three substituents independently selected from RX;
• R3 is C1-C3alkyl or C1-C3haloalkyl;
• R4 is
• where the staggered line represents the connection of R4 to Qa or Qb;
• A1, A2, and A3 are, independently of each other, N or CH;
• R4c is C1-C3alkyl, C1-C3haloalkyl, allyl, propargyl, or C3-C6cycloalkylC1-C4alkyl;
• R5 is hydrogen, C1-C3alkyl, C1-C3haloalkyl, C3-C4cycloalkyl, C1-C3alkoxy, C3-C4alkoxyC(O)—, (C1-C3alkoxy)2CH—, halogen, —CN, NH2C(O)—, amino (i.e —NH2), (C1-C3alkyl)amino, di(C1-C3alkyl)amino, hydroxy, C3-C4halocycloalkyl, C3-C4cyanocycloalkyl, C2-C6alkenyl, C2-C6haloalkenyl, C2-C6alkynyl, C2-C6haloalkynyl, C1-C4haloalkylsulfanyl, C1-C4haloalkylsulfinyl, C1-C4haloalkylsulfonyl, C1-C4alkylsulfanyl, C1-C4alkylsulfinyl, C1-C4alkylsulfonyl, C1-C3alkoxy-C1-C3alkyl, C1-C3alkoxy-C1-C3alkoxy-C1-C3alkyl, (C1-C3alkyl)sulfonylamino, (C1-C3alkyl)sulfonyl(C1-C3alkyl)amino, (C1-C3alkyl)NHC(O)—, (C1-C3alkyl)2NC(O)—, (C3-C4cycloalkyl)NHC(O)—, (C3-C4cycloalkyl)(C1-C3alkyl)NC(O)—, (C1-C3alkyl)C(O)(C1-C3alkyl)N—, (C1-C3alkyl)C(O)NH—, (C1-C3alkyl)C(O)—, (C1-C3alkoxy)C(O)—, HC(O)—, diphenylmethanimine, C1-C3haloalkoxy, phenyl, or a 5-membered heteroaromatic ring;
• or
• R5 is phenyl substituted with one to three substituents selected from C1-C3alkyl, C1-C3haloalkyl, C1-C3alkoxy, C3-C4cycloalkyl, halogen, —CN and hydroxyl;
• or
• R5 is a 5-membered heteroaromatic ring substituted with one to three substituents selected from C1-C3alkyl, C1-C3haloalkyl, C1-C3alkoxy, C3-C4cycloalkyl, halogen, —CN and hydroxyl;
• R5a and R5b are, independently of each other, selected from hydrogen, halogen, —CN, C1-C3alkyl, C1-C3haloalkyl, C3-C4cycloalkyl, C1-C3alkoxy, and C1-C3haloalkoxy;
• R6 is phenyl, benzyl, heteroaryl, or C3-C6cycloalkyl;
• or
• R6 is phenyl, benzyl, heteroaryl, or C3-C6cycloalkyl, each of which, independently of each other, is substituted with one to three substituents independently selected from RX;
• RX is independently selected from halogen, C1-C3alkyl, C1-C3haloalkyl, C1-C3alkoxy, C1-C3haloalkoxy, NO2, SF5, CN, —C(O)NH2, —C(S)NH2, C1-C4haloalkylsulfanyl, C1-C4haloalkylsulfinyl, C1-C4haloalkylsulfonyl, C1-C4alkylsulfanyl, C1-C4alkylsulfinyl and C1-C4alkylsulfonyl;
• RY is selected from hydrogen, C1-C3 alkyl, C1-C3haloalkyl, hydroxy, C1-C3alkoxy, C1-C3haloalkoxy, halogen, —CN and cyclopropyl;
• RZ is selected from oxo, halogen, C1-C3alkyl, C1-C3haloalkyl, C1-C3alkoxy, C1-C3haloalkoxy and CN;
• X0 is O or S;
• and
• an agrochemically acceptable salt, stereoisomer, enantiomer, tautomer and N-oxide of the compound of formula I.