A diene compound or a salt or diene monoxide controls fungal diseases in plants. 1. Characteristic 1: Diene compounds represented by formula (1)；Or salt or nitrous oxideWhere R1,R2 and R3 are identical or different, each representing hydrogen.Halogen.1. C83218331 and 832626 leased land；Halogenated tar C832183531832626,Alcoxi C832188331636262；Haloalcoxy C83218C833316A3；2. Alcox C83218D83316AZ26； Acquilo C83218D31832626；A. Haloalcoxy C83218D-83316A； Acquiro C83218C-8331832626；Alquenilo C83228331-832626；Haloalquenilo C83228331-832626；1.C 83228331 asphalt；A. Halogenated tar C832283318326；Cyoquilo C83238C83318328；Cyoquilo C83232388328； Rent C832183318326；Alternative Arilo,Non-biological alternativesOr an alternative anomalous combinationTwo R1 groups,R2 and r3,Together,They can make a ring.Through or without at least one hetero-atom,The group represented by R1,2.5.2.3.2 In addition, alternative R 2 and R3 can be replaced.Y1 represents the alternative Arilo,Substitutory pyridineSubstitutory pyridine1. Selective substitution of pyridine or pyridine；Y2 stands for alternative Arilo or alternative heterosexual Arilo.Q stands for hydrogen.Nitro,Cyanogen1. C83218331 and 832626 leased land；Halogenated tar C832183531832626,Cyoquilo C83238C83318328；Cyoquilo C83232388328； Rent C832183318326；C83217C8331832626 bitumenHalocarbonilo C8321C8331832626；Cyoquilcarbonilo C83323318328；2. Alcoxibonilo C83218C83316526；B. Halogenated alcoxicarbonilo C8321C8331832626；C8323236C83318328；1. C832121 asphalt；Halogenated tar C83217C8331832626；Cyoquiltio C832383318328；1. Cyclolquilo C83238C8328； asphalt C8321218331832626；2. Alcox C83218C83331-83226； asphalt C83218833126；C83217C8331832626 asphalt；C83217C8331832626 asphalt；1. Halogen C83216C833183226；A. Halogenated tar C8321C8331832626；C83231；Cyoquils finalilo C83223318328；1. Cyclolquilo C83238C8328； Acquilsulfonilo C83213531832626；Cyclokquilo C832323 degrees-83318328； - asphalt C8321833126；Alternative text:Alternative alternatives to Aril-asphalt C8321C
