Chlorinated phosphorylmethylcarbonyl derivative plant protection agents

A chlorinated phosphorylmethylcarbonyl derivative of the formula ##STR107## in which R.sup.1 represents radicals from the series comprising alkyl with up to 6 carbon atoms, alkoxy with up to 6 carbon atoms and aralkyl and aralkoxy with 6 to 10 carbon atoms in the aryl part and up to 2 carbon atoms in the alkyl part, in each case optionally monosubstituted or polysubsttuted by halogen or C.sub.1 -C.sub.4 -alkoxy, or represents phenyl which is optionally monosubstituted or polysubstituted by halogen, nitro, C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy and/or C.sub.1 -C.sub.4 -alkoxycarbonyl, and

• R.sup.2 represents alkoxy with up to 6 carbon atoms or aralkoxy with 6 to 10 carbon atoms in the alkyl part and up to 2 carbon atoms in the alkyl part, in each case optionally monosubstituted or polysubstituted by halogen or C.sub.1 -C.sub.4 -alkoxy, or R.sup.1 and R.sup.2 together represent a branched or straight-chain alkanedioxy radical with 2 to 5 carbon atoms in the alkyl part,
• X represents hydrogen or chlorine and
• R.sup.3 represents the grouping ##STR108## in which R.sup.4 represents hydrogen or alkyl with up to 4 carbon atoms and
• R.sup.5 represents an alkoxycarbonyl radical with up to 4 carbon atoms in the alkyl part or represents an optionally substituted pyrazolyl radical ##STR109## wherein R.sup.7 and R.sup.9 are identical or different and represent hydrogen or C.sub.1 -C.sub.4 alkyl and
• R.sup.8 represents hydrogen, halogen or C.sub.1-C.sub.4 -alkyl;
• or
• if X represents chlorine, R.sup.3 also may represent cycloalkyl with 3 to 6 carbon atoms, which is optionally monosubstituted or polysubstituted by C.sub.1 -C.sub.3 -alkyl.