2. Oxadiazoles or positive oxides and / or their effective salts used in agriculture, and the use of these substances to control phytotoxin fungi, or the use of a method to control harmful phytotoxin fungi, including the use of a certain amount of treatment of fungi or materials, plants, soil or seeds that wish to prevent chemical attack； The effectiveness of at least one compound, nitrous oxide or an acceptable salt in agriculture； and a mixture containing at least one such compound and at least one other active pesticide selected from the group of herbicides, protectors and fungicides,Insecticides and regulators for plant growth； agricultural chemicals including at least one compound and also seeds. 1. Property 1: compound (1) with formula property,or the N-oxides, or salts thereof acceptable in agriculture, wherein: A is a 5 or 6 membered phenyl ring or an aromatic heterocycle, wherein the aromatic heterocycle ring member atoms include, in addition to atoms carbon, 1, 2, 3 or 4 heteroatoms selected from N, O and S as ring member atoms； and wherein the phenyl ring or aromatic heterocycle is unsubstituted or substituted with 1, 2, 3 or 4 identical or different RA groups； wherein RA is halogen, cyano, di-C₁₋₆-alkylamino, C₁₋₆-alkyl, C₁₋₆-alkoxy, C₁₋₆-alkylthio, C₁₋₆-alkylsulfinyl, C₁₋₆-alkylsulfonyl, C₂₋₆- alkenyl,C₂₋₆-alkynyl, C₃₋₈-cycloalkyl or C₃₋₈-cycloalkoxy； and wherein any of the aliphatic or cyclic portions is unsubstituted or substituted with 1, 2, 3, 4 or up to the maximum possible number 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, C₁₋₄-alkoxy- C₁₋₄-alkyl or C₃₋₈-cycloalkyl； L is # -C (= X) -NR- or # -NR-C (= X) -,where # indicates the position to which the cyclic group A is attached； and where X is O or S； and R is hydrogen, C₁₋₆-alkyl, C₁₋₆-alkoxy, C₂₋₆-alkenyl, C₂₋₆-alkynyl, C₃₋₆-cycloalkyl, C₃₋₆-cycloalkenyl, C (= O) - (C₁₋ ₆-alkyl),C (3
