Use of organophosphorus compounds of the general formula (I)
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- in which R3 and R4 are identical or different and are selected from the group which consists of hydrogen, substituted and unsubstituted alkyl with up to 26 carbon atoms, substituted and unsubstituted hydroxyalkyl with up to 26 carbon atoms, substituted and unsubstituted aryl, substituted and unsubstituted acyl, substituted and unsubstituted aralkyl, substituted and unsubstituted alkenyl with up to 26 carbon atoms, substituted and unsubstituted alkynyl with up to 26 carbon atoms, substituted and unsubstituted cycloalkyl, substituted and unsubstituted heterocyclic residue, halogen, OX3 or OX4, wherein X3 or X4 may be identical or different and are selected from the group which consists of hydrogen, substituted and unsubstituted alkyl with up to 26 carbon atoms, substituted and unsubstituted hydroxyalkyl with up to 26 carbon atoms, substituted and unsubstituted aryl, substituted and unsubstituted aralkyl, substituted and unsubstituted alkenyl with up to 26 carbon atoms, substituted and unsubstituted alkynyl with up to 26 carbon atoms, substituted and unsubstituted cycloalkyl, substituted and unsubstituted heterocyclic residue, a silyl, a cation of an organic and inorganic base, in particular a metal of main groups I, II or III of the periodic system, ammonium, substituted ammonium and ammonium compounds which are derived from ethylenediamine or amino acids, and B is selected from the group which consists of group (II)
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- and group (III),
- R1—N═A— (III)
- wherein A is selected from the group which consists of a substituted and unsubstituted alkyleneamine residue, a substituted and unsubstituted alkenyleneamine residue, a substituted and unsubstituted alkyleneimine residue and a substituted and unsubstituted alkenyleneimine residue and a hydroxyalkyleneimine residue, wherein the nitrogen atom is located in the chain which links the phosphorus atom with the nitrogen atom of the group
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- or the group R1—N═, and in which R1 and R2 in group (II) are identical or different and R1 and R2 for group (II) and R1 for group (III) are selected from the group which consists of hydrogen, substituted and unsubstituted alkyl, substituted and unsubstituted hydroxyalkyl, substituted and unsubstituted alkenyl, substituted and unsubstituted alkynyl, substituted and unsubstituted aryl, substituted and unsubstituted acyl, substituted and unsubstituted cycloalkyl, substituted and unsubstituted aralkyl, substituted and unsubstituted heterocyclic residue, halogen, OX1 and OX2, wherein X1 and X2 may be identical or different and are selected from the group which consists of hydrogen, substituted and unsubstituted alkyl, substituted and unsubstituted hydroxyalkyl, substituted and unsubstituted alkenyl, substituted and unsubstituted alkynyl, substituted and unsubstituted aryl, substituted and unsubstituted acyl, substituted and unsubstituted cycloalkyl, substituted and unsubstituted aralkyl, substituted and unsubstituted heterocyclic residue, and the pharmaceutically acceptable salts, esters and amides and salts of the esters for the treatment of infectious processes in humans and animals which are caused by viruses, bacteria, fungi or parasites and as a fungicide, bactericide or herbicide in plants.