Benzimidazole compound or salt thereof, preparation method therefor and use thereof, and insecticide and acaricide and use thereof

A benzimidazole compound or a salt thereof, wherein the benzimidazole compound has a structure represented by a formula (I):

• wherein in the formula (I),
• R is selected from substituted or unsubstituted C2-C10 alkyl, substituted or unsubstituted C3-C10 cycloalkyl, substituted or unsubstituted C2-C10 alkenyl, and substituted or unsubstituted C2-C10 alkynyl, and optionally present substituents are each independently selected from at least one of halogen, C1-C10 alkyl, halo C1-C10 alkyl, C3-C10 cycloalkyl, halo C3-C10 cycloalkyl, C1-C10 alkoxy, halo C1-C10 alkoxy, C3-C10 cycloalkoxy, and halo C3-C10 cycloalkoxy;
• Y1, Y2, Y3, Y4, and Y5 are each independently selected from H, halogen, CN, NO2, formyl, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C3-C10 cycloalkyl, substituted or unsubstituted C1-C10 alkoxy, substituted or unsubstituted C1-C10 alkylthio, substituted or unsubstituted C1-C10 alkylsulfinyl, substituted or unsubstituted C1-C10 alkylsulfonyl, substituted or unsubstituted C1-C10 alkylcarbonyl, substituted or unsubstituted C1-C10 alkoxycarbonyl, substituted or unsubstituted arylcarbonyl, substituted or unsubstituted aryloxycarbonyl, substituted or unsubstituted C2-C6 alkenyl, substituted or unsubstituted C2-C6 alkynyl, substituted or unsubstituted C2-C6 alkenyloxy, substituted or unsubstituted C2-C6 alkynyloxy, substituted or unsubstituted C1-C10 alkylcarbonyloxy, substituted or unsubstituted C1-C10 cyanoalkyl, substituted or unsubstituted C1-C10 cyanoalkoxy, substituted or unsubstituted silyl, substituted or unsubstituted amino, substituted or unsubstituted aryl, substituted or unsubstituted aryl C1-C6 alkyl, substituted or unsubstituted aryloxy, substituted or unsubstituted aryl C1-C6 alkoxy, substituted or unsubstituted arylsulfonyl, substituted or unsubstituted arylsulfinyl, substituted or unsubstituted arylthio, substituted or unsubstituted aryl C1-C6 alkylsulfonyl, substituted or unsubstituted aryl C1-C6 alkylsulfinyl, substituted or unsubstituted aryl C1-C6 alkylthio, substituted or unsubstituted heterocyclyl, substituted or unsubstituted heterocyclyl C1-C6 alkyl, and substituted or unsubstituted heterocyclyloxy, and optionally present substituents are each independently selected from at least one of halogen, C1-C10 alkyl, halo C1-C10 alkyl, C3-C10 cycloalkyl, halo C3-C10 cycloalkyl, C1-C10 alkoxy, halo C1-C10 alkoxy, C3-C10 cycloalkoxy, and halo C3-C10 cycloalkoxy;
• and optionally, any two adjacent groups of Y1, Y2, Y3, Y4, and Y5 form one group, and at least one group and a bonded benzene ring are cyclized with or without at least one heteroatom to form at least one 3- to 8-membered ring;
• Z1, Z2, Z3, and Z4 are each independently selected from H, halogen, CN, NO2, formyl, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C3-C10 cycloalkyl, substituted or unsubstituted C1-C10 alkoxy, substituted or unsubstituted C1-C10 alkylthio, substituted or unsubstituted C1-C10 alkylsulfinyl, substituted or unsubstituted C1-C10 alkylsulfonyl, substituted or unsubstituted C1-C10 alkylcarbonyl, substituted or unsubstituted C1-C10 alkoxycarbonyl, substituted or unsubstituted arylcarbonyl, substituted or unsubstituted aryloxycarbonyl, substituted or unsubstituted C2-C6 alkenyl, substituted or unsubstituted C2-C6 alkynyl, substituted or unsubstituted C2-C6 alkenyloxy, substituted or unsubstituted C2-C6 alkynyloxy, substituted or unsubstituted C1-C10 alkylcarbonyloxy, substituted or unsubstituted C1-C10 cyanoalkyl, substituted or unsubstituted C1-C10 cyanoalkoxy, substituted or unsubstituted silyl, substituted or unsubstituted amino, substituted or unsubstituted aryl, substituted or unsubstituted aryl C1-C6 alkyl, substituted or unsubstituted aryloxy, substituted or unsubstituted aryl C1-C6 alkoxy, substituted or unsubstituted arylsulfonyl, substituted or unsubstituted arylsulfinyl, substituted or unsubstituted arylthio, substituted or unsubstituted aryl C1-C6 alkylsulfonyl, substituted or unsubstituted aryl C1-C6 alkylsulfinyl, substituted or unsubstituted aryl C1-C6 alkylthio, substituted or unsubstituted heterocyclyl, substituted or unsubstituted heterocyclyl C1-C6 alkyl, and substituted or unsubstituted heterocyclyloxy, and optionally present substituents are each independently selected from at least one of halogen, C1-C10 alkyl, halo C1-C10 alkyl, C3-C10 cycloalkyl, halo C3-C10 cycloalkyl, C1-C10 alkoxy, halo C1-C10 alkoxy, C3-C10 cycloalkoxy, and halo C3-C10 cycloalkoxy;
• and optionally, any two adjacent groups of Z1, Z2, Z3, and Z4 form one group, and at least one group and a bonded benzene ring are cyclized with or without at least one heteroatom to form at least one 3- to 8-membered ring;
• and
• when Z1, Z2, Z3, Z4, Y1, Y2, Y3, and Y4 are all H and R is ethyl, Y5 is not H, fluorine or chlorine;
• when Z1, Z2, Z3, Z4, Y1, Y2, Y4, and Y5 are all H and R is ethyl, Y3 is not fluorine or chlorine;
• and when Z1, Z2, Z3, Z4, Y1, Y3, and Y5 are all H and R is ethyl, Y2 and Y4 are not simultaneously chlorine.