Herbicidal compositions

An aminopyrimidine of the formula III ##STR110## wherein E is --CH.dbd.,

• Z is oxygen or sulfur,
• R.sup.3 is hydrogen, C.sub.1 -C.sub.4 -alkyl, C.sub.3 -C.sub.4 -alkenyl or C.sub.1 -C.sub.4 -alkoxy,
• R.sup.4 is hydrogen, halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -haloalkyl, C.sub.1 -C.sub.4 -haloalkoxy, C.sub.1 -C.sub.4 -alkylthio, C.sub.2 -C.sub.4 -alkoxyalkyl, C.sub.2 -C.sub.4 -alkoxyalkoxy, cyclopropyl, --NH.sub.2, C.sub.1 -C.sub.4 -alkylamino, di-C.sub.1 -C.sub.4 -alkylamino, or a saturated 5- to 7-membered nitrogen heterocycle selected from pyrrolidine, piperidine, morpholine, thiomorpholine, piperazine and hexamethyleneimine,
• R.sup.5 is cyano, --CZ--R.sup.13, ##STR111## or an unsaturated heterocycle selected from imidazole, triazole, pyridine, pyrimidine, thiazole, oxazole, thiadiazole, oxadiazole, pyridazine, thiophene or furan, as well as partially unsaturated derivatives thereof which are unsubstituted or substituted by a radical selected from the group comprising halogen, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -haloalkyl,
• R.sup.13 is C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.1 -C.sub.4 -alkylthio, phenyl, di-C.sub.1 --C.sub.4 -alkylamino, or a saturated 5- to 7-membered nitrogen heterocycle selected from pyrrolidine, piperidine, morpholine, thiomorpholine, piperazine and hexamethyleneimine and
• R.sup.14 and R.sup.15 independently of one another are C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, C.sub.3 -C.sub.4 -alkoxyalkoxy, C.sub.3 -C.sub.4 -alkenyloxy, C.sub.1 -C.sub.6 -alkylthio, C.sub.1 -C.sub.4 -alkylamino or di-C.sub.1 -C.sub.4 -alkylamino.