Oxadiazine derivatives.

The compounds are prepared by a known method and can be used as agrochemically active substances. They have a formula in which A stands for one unsubstituted or mono- or polysubstituted aromatic or non-aromatic, monocyclic or bicyclic, heterocyclic radical, such as from one to two of R & lt; 1 & gt; the substituents of A may be selected from the group consisting of halogen-C1-C3 alkyl, cyclopropyl, halo-cyclopropyl, C2-C3 alkenyl, C2-C3 alkynyl, halo-C2-C3 alkenyl, halogen-C 2 -C 3 alkynyl, halogen-C 1 -C 3 alkoxy (alcoholate halogen), C 1 -C 3 alkoxy, C3 alkylthio, halo-C1-C3 alkylthio, allyloxy, for aryloxy, allylthio, propargylthio, haloalanyl, haloalkylthio, cyano and nitro, and one to four of the substituents of A are from the group consisting of C1-C3 alkyl, C1-C3 alkoxy and halogen; R represents hydrogen, C1-C6 alkyl, phenyl C1-C4 alkyl, C3-C6 cycloalkyl, C2-C6 alkenyl or C2-C6 alkynyl and X represents N-NO2 or N-CN or a corresponding tautomer in free form or in the form of salts.