This note covers the scope of 5-fluoro-4-imino-3 - (substituted) - 3,4-dihydropyridine-2 (1H) onas and its derivatives, and the use of these compounds as fungicides. 1. Claim 1: a formula compound (1),where R¹ is: C₁₋₆ alkyl optionally substituted with 1-3 R³；1. Alquenilo c83218d83316 alternative 1-3r 3；1. C833238331-832626 replaces 1-3r 3 m3；1. Phenyl or benzene, each of which can be replaced by 1-3r83088；O 5 or 6 members for saturated or unsaturated rings, 5-6 members for combined rings, or 6-6 members for combined rings, each containing 1-3 heteroatoms, each of which can be replaced by 1-3 r830808；- (CHR) OR-C (3DO) R-C (3DS) R-C (3DO) OR-C (3DS) OR-S (O) R- (CHR) N (R) R-C (3DO) N (R) Ro -C (3DS) N (R) Rwhere m is an integer 1 - 3； R² is: H； or C₁₋₆ alkyl optionally substituted with R³；R³ is, independently, halogen, C₁₋₆ alkyl,C₁₋₄ haloalkyl,C₁₋₄ alkoxy,C₁₋₄ haloalkoxy,Cilt alkylthio,Halogenated tar c831832421；amino, halotium, C₁₋₃ alkylamino,C₂₋₆ alkoxycarbonyl,C₂₋₆ alkylcarbonyl,C₂₋₆ alkylaminocarbonyl,Hydroxy, trialquilsillo c83231；or a saturated or unsaturated 5 or 6 member ring system, or a fused 5-6 member ring system, or a fused 6 - 6 member ring system, each containing 1 - 3 heteroatoms, where each ring it may be optionally substituted with 1-3 R； R⁴ is independently halogen, C₁₋₆ alkyl,C₁₋₆ haloalkyl,C₁₋₆ alkoxy,C₁₋₆ haloalkoxy,1. C8332121 asphalt；Halogenated tar c83217c831832626；Halotio, amino, lease c83231；Cquila dialkylamino,C₂₋₆ alkoxycarbonyl,C₁₋₆ alkyl sulfonyl or C₂₋₆ alkylcarbonyl,nitro hidroxilo o ciano R es H alquilo CC₁₋₆ alkoxy,1. Benzene or benzene, each of which can be replaced by 1-3r83088；R8310es h, rental c83231；C₂₋₆ alkenyl,1. C 83238331 asphalt；C₁₋₆ haloalkyl,C₁₋₆ alkoxyalkyl,C₂₋₆ alkylcarbonyl,1. Phenyl or benzene, each of which can be replaced by 1-3r83088；O a saturated or unsaturated ring system has 5 to 6 members, a combined ring system with 5 to 6 members, or even a ring system with 6 to 6 members, each of which contains 1 to 3 h
