Claim 1: use of formula compounds (1),Or positive oxide or salt acceptable in agriculture, which is characterized by the control of harmful plant toxin fungi, in which a is phenyl, or 5-6 members of the heteroaromatic cycle, in which, in addition to carbon atoms, the heteroaromatic cyclic atoms also include 1, 2, 3 or 4 heteroatoms selected from n or s as ring atoms； among these heteroatoms, the a-period group will not be replaced or replaced by the same or different 1, 2, 3 or 4 R groups； there. A RA is halogen, Ciano, di-c832131；C₁₋₆-alkylsulfonyl, C₂₋₆-alkenyl, C₂₋₆-alkynyl, C₃₋₈-cycloalkyl or C₃₋₈-cycloalkoxy； and wherein any of the aliphatic or cyclic moieties are unsubstituted or substituted with 1, 2, 3, 4 or up to the maximum possible amount of identical or different Rᵃ groups； wherein Rᵃ is halogen, cyano, C₁₋₆-alkyl, C₁₋₆-haloalkyl, C₁₋₆-alkoxy, C₁₋₆-haloalkoxy, C₁₋₆-alkylthio, C₁₋₆-haloalkylthio or C₃₋₈-cycloalkyl or C₁₋₄-alkoxy-C₁₋₄-alkyl； L is -C (= O) -,-C (3DS) - o -S (3DO) -P is 0, 1 or 2； R1,They are independent,hydrogen, C₁₋₆-alkyl, C₁₋₆-alkoxy, C₂₋₆-alkenyl, C₂₋₆-alkynyl, C₃₋₈-cycloalkyl, C₃₋₈-cycloalkenyl, -C (= O) - (C₁₋₆- I rent),-C (3DO) - (C -alcoxi)C₁₋₆-alkoxyimino-C₁₋₄-alkyl, C₂₋₆-alkenyloxyimino-C₁₋₄-alkyl, C₂₋₆-alkynyloxyimino-C₁₋₄-alkyl, aminocarbonyl-C₁₋₆-alkyl, C₃₋₆-cycloalkyl- C₁₋₄-alkyl, phenyl-C₁₋₄-alkyl, heteroaryl-C₁₋₄-alkyl, heterocyclyl-C₁₋₄alkyl, phenyl, naphthyl or a 3- to 10-membered saturated, partially unsaturated or aromatic mono- or bicyclic heterocycle, wherein the ring member atoms of said mono- or bicyclic heterocycle include, in addition to carbon atoms, 1, 2, 3 or 4 additional heteroatoms selected from N, O and S as ring member atoms,In this case, the heterocyclic carbon ring composed of one or two atoms can be replaced by one or two selected groups independent of C (= O) and C (= s).and wherein the heteroaryl group in heteroaryl-C₁₋₄-alkyl is a 5- or 6-membered aromatic heterocycle, wherein the ring member atoms of
