Claim 1: pyridine compound (1) in the formula,where the dotted line (- - - - -) is a single bond or a double bond； R¹ is C₁₋₆-alkyl, C₁₋₆-haloalkyl, HO-C₁₋₆-alkyl, C₃₋₆-alkenyl, C₃₋₆-haloalkenyl, C₂₋₆-alkynyl, C₃₋₆-haloalkynyl, C₁₋₆- alkoxy-C₁₋₆-alkyl, C₁₋₆-alkoxy, C₃₋₆-alkenyloxy, C₃₋₆-haloalkenyloxy, C₃₋₆-alkynyloxy, C₃₋₆-haloalkynyloxy, C₁₋₆-haloalkoxy, C₃₋₆-cycloalkoxy, C₃₋₆-halocycloalkoxy, C₃₋₆-cycloalkenyloxy, C₃₋₆-halocycloalkenyloxy, C₁₋₆-alkylthio, C₁₋₆-haloalkylthio, (C₁₋₆-alkyl) amino, di (C₁₋₆-alkyl) amino, C₁ ₋₆-alkylsulfinyl,C₁₋₆-alkylsulfonyl, C₃₋₆-cycloalkyl, C₃₋₆-cycloalkenyl, C₃₋₆-halocycloalkyl, C₃₋₆-halocycloalkenyl, [1- (C₁₋₆-alkyl)] - C₃₋₆-cycloalkyl, [1 - (C₃₋₆-alkenyl)] - C₃₋₆-cycloalkyl, [1- (C₂₋₆-alkynyl)] - C₃₋₆-cycloalkyl, [1- (C₁₋₆-haloalkyl)] - C₃₋₆- cycloalkyl, [1- (C₃₋₆-haloalkenyl)] - C₃₋₆-cycloalkyl, [1- (C₃₋₆-haloalquinyl)] - C₃₋₆-cycloalkyl, C₃₋₆-cycloalkyl-C₁₋₆-alkyl, C₃₋₆-cycloalkyl-C₁₋₆-haloalkyl, C₃₋₆-cycloalkyl-C₁₋₆-alkoxy, C₃₋₆-cycloalkyl-C₁₋₆-haloalkoxy, phenyl, 5- or 6-membered heteroaryl,O isomerization of 3 to 6 members； in this case, the periodic group of R1 will not be replaced or replaced by r74919；R es C -alquilo C -haloalquilo C -alquenilo C -haloalquenilo C -alcoxi-C -alquenilo C -alcoxi-C -haloalquenilo C -haloalcoxi-C -alquenilo C -haloalcoxi-C -haloalquenilo C -alquinilo C -haloalquinilo C - C₃₋₆-cycloalkyl-C₁₋₆-haloalkyl, C₃₋₆-halocycloalkyl-C₁₋₆-alkyl, C₃₋₆-halocycloalkyl-C₁₋₆-haloalkyl, C₃₋₆-cycloalkenyl-C₁₋₆-alkyl, C₃₋ ₆-cycloalkenyl-C₁₋₆-haloalkyl, C₃₋₆-halocycloalkenyl-C₁₋₆-alkyl, C₃₋₆-halocycloalkenyl-C₁₋₆-haloalkyl, C₃₋₆-cycloalkyl-C₂₋₆-alkenyl, C₃₋₆- cycloalkyl-C₂₋₆-haloalkenyl, C₃₋₆-halocycloalkyl-C₂₋₆-alkenyl, C₃₋₆-halocycloalkyl-C₂₋₆-haloalkenyl, C₃₋₆-cycloalkenyl-C₂₋₆-alkenyl, C₃₋₆-cycloalkenyl- C₂₋₆-haloalkenyl, C₃₋₆-halocycloalkenyl-C₂₋₆-alkenyl,C₃₋₆-halocycloalkenyl-C₂₋₆-haloalkenyl, C₃₋₆-cycloalkyl-C₂₋₆-alkynyl, C₃₋₆-cycloalkyl-C₃₋₆-haloalkynyl, C₃₋₆-halocycloalkyl-C₂₋₆-alkynyl, C₃₋ Halo-halocy
