FIELD: agriculture, plant protection. SUBSTANCE: the fungicidal double- component composition is described which contains above 70 weight% of R-metalaxyl enentiomer (I) and additional component (IIA) 4-[3-(4- chlorphenyl)-3-(3.4-dimetoxyphenyl)acryloil] morpholin ("dimetomorph") or (IIB) 3-anilino-5- methyl-5-(4-phenoxyphenyl)-1.3- oxasolydin-2.4- dion (famoxadon) at weight ratio I:II being from 10:1 to 1:10 together with acceptable carriers. It is, also, described the method to fight and prevent infections in plants, plants' parts or places of oomycetes-type fungi growing at applying the above-mentioned composition. EFFECT: higher activity. 10 cl, 3 tbl _
