The diploma thesis deals with the analysis of weed infestation of spring and winter cereal crops, where spring crops (Hordeum vulgare), oat (Avena sativa), winter barley (Hordeum vulgare) and winter wheat (Triticum aestivum) were subject to control. The theoretical part describes the harmfulness of weed species, which we encounter on agricultural land, followed by problems with their regulation. This issue is followed by growing technology of propagation stands. Of the found weed species in the propagation stands, they are particularly dangerous (Wild oat, Silky bent grass, Couch grass).