GUANIDINE HAVING BACTERICIDAL EFFECT

Guanidines I (* CHEMICAL STRUCTURE *) (I) (A=C5-C12-cycloalkyl which may bear up to three further substituents; benzyl substituted in the para-position; R1, R2, R3=H, C1-C4-alkyl; R4=C5-C18-alkyl which may be interrupted by oxygen, C5-C18-alkenyl, C4-C18-alkynyl or phenyl-C1-C6-alkyl, and these groups may bear up to three further substituents and the phenyl moiety of the phenylalkyl may additionally bear a phenoxy group or up to three C2-C4-alkenyl, C1-C4-alkoxy-C1-C4-alkyl, C1-C6-alkyl or haloalkyl groups, C5-C6-cycloalkyl-C1-C8-alkyl, where the ring may bear up to three further substituents; A=benzyl and R4=C3-C4-alkyl which may be interrupted by oxygen, or C4-alkenyl, both of which may bear up to three further substituents; R3+R4=C5-C6-heterocycle which may bear up to three further substituents and may be interrupted by oxygen) and the salts I.HX and the metal complexes of I. The compounds I are suitable as fungicides.