The present invention relates to novel fungicidal two-component
compositions based on metalaxyl having an R-enantiomer content of more
than 70% by weight as one essential component and a second fungicidal
component, for the treatment of phytopathogenic diseases of crop plants,
especially phytopathogenic fungi, and to a method of combating
phytopathogenic diseases on crop plants. The metalaxyl component is
called active ingredient I.The following fungicides may be used as the
second component II of the mixture: either a compound IIA
N-(3'-(1'-chloro-3-methyl 2'-oxopentan))-3,5-dichloro-4-methylbenzamide
(EP-600629); or a compound IIB (EP-253213) methyl
(E)-2-methoxyimino-[2-(o-tolyloxymethyl)phenyl]acetate; or a
(S)-valinamide of formula IIC (EP-472996) ##STR00001## wherein R.sub.4
is isopropyl, and R.sub.5 is 4-methylphenyl, and wherein the asymmetric
center is preferably (R); or a compound IID (EP-551048)
(S)-1-anilino-4-methyl-2-methylthio-4-phenylimidazolin-5-one; or a
compound IIE, the Pseudomonas fluoresens strain, ATCC accession No. 55169
(U.S. Pat. No. 5,348,742) is particulary effective in combating or
preventing fungal diseases of crop plants. These combinations exhibit
synergistic fungicidal activity.