Phosphonous acid derivatives, processes for their preparation and their use in combating microorganisms.

摘要

Phosphonous acid derivatives of the general formula I (I) or the corresponding zwitterion form, in which R, R1, R2 and R3 have the meanings given hereinafter, are valuable microbicides. They are being manufactured according to known methods of peptide synthesis and may be used to protect plants from the attack of plant-pathogenic bacteria and fungi.