Iminooxybenzyl compounds of the formula I ##STR1## where R.sup.1 is C(CO.sub.2 R.sup.a).dbd.CHR.sup.b, C(CO.sub.2 R.sup.a).dbd.CHOR.sup.b, C(CO.sub.2 R.sup.a).dbd.NOR.sup.b or C(CONR.sup.a R.sup.c).dbd.NOR.sup.b ;R.sup.a, R.sup.b are alkyl;R.sup.c is hydrogen or alkyl;R.sup.3 is hydrogen, cyano, halogen, alkyl, haloalkyl, alkenyl, alkoxy, alkynyl, haloalkoxy, alkenyloxy, haloalkenyloxy, alkynyloxy, haloalkynyloxy, alkylthio, haloalkylthio or (bi)cycloalkly;R.sup.4 is hydrogen, cyano, halogen, optionally substituted alkyl, alkoxy, alkylthio, alkenyl, alkenyloxy, alkenylthio, alkynyl, alkynyloxy or alkynylthio; an optionally substituted ring which can contain, as ring members, one to three of the following hetero atoms: oxygen, sulfur and nitro, in addition to carbon atoms, and which can be bonded to the skeleton directly or via an oxygen or sulfur atom; or an optionally substituted aromatic or heteroaromatic radical;R.sup.5 an optionally substituted aromatic radical, their preparation, and their use are described.